1 /* Definitions of target machine for Mitsubishi D30V.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 /* D30V specific macros */
27 /* Align an address */
28 #define D30V_ALIGN(addr,align) (((addr) + (align) - 1) & ~((align) - 1))
31 /* Driver configuration */
33 /* Defined in svr4.h. */
34 /* #define SWITCH_TAKES_ARG(CHAR) */
36 /* Defined in svr4.h. */
37 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
39 /* Defined in svr4.h. */
42 %{!mno-asm-optimize: %{O*: %{!O0: -O} %{O0: %{masm-optimize: -O}}}} \
43 %{v} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
45 /* Defined in svr4.h. */
46 /* #define ASM_FINAL_SPEC "" */
48 /* Defined in svr4.h. */
53 %{static:-dn -Bstatic} \
54 %{shared:-G -dy -z text} \
55 %{symbolic:-Bsymbolic -G -dy -z text} \
59 %{mextmem: -m d30v_e} %{mextmemory: -m d30v_e} %{monchip: -m d30v_o}"
61 /* Defined in svr4.h. */
63 #define LIB_SPEC "--start-group -lsim -lc --end-group"
65 /* Defined in svr4.h. */
67 #define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
69 /* Defined in svr4.h. */
71 #define ENDFILE_SPEC "crtend%O%s"
73 /* Defined in svr4.h for host compilers. */
74 /* #define MD_EXEC_PREFIX "" */
76 /* Defined in svr4.h for host compilers. */
77 /* #define MD_STARTFILE_PREFIX "" */
80 /* Run-time target specifications */
82 #define CPP_PREDEFINES "-D__D30V__ -Amachine=d30v"
84 /* This declaration should be present. */
85 extern int target_flags;
87 #define MASK_NO_COND_MOVE 0x00000001 /* disable conditional moves */
89 #define MASK_DEBUG_ARG 0x10000000 /* debug argument handling */
90 #define MASK_DEBUG_STACK 0x20000000 /* debug stack allocations */
91 #define MASK_DEBUG_ADDR 0x40000000 /* debug GO_IF_LEGITIMATE_ADDRESS */
93 #define TARGET_NO_COND_MOVE (target_flags & MASK_NO_COND_MOVE)
94 #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
95 #define TARGET_DEBUG_STACK (target_flags & MASK_DEBUG_STACK)
96 #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR)
98 #define TARGET_COND_MOVE (! TARGET_NO_COND_MOVE)
100 /* Default switches used. */
101 #ifndef TARGET_DEFAULT
102 #define TARGET_DEFAULT 0
105 #define TARGET_SWITCHES \
107 { "cond-move", -MASK_NO_COND_MOVE, \
108 N_("Enable use of conditional move instructions") }, \
110 { "no-cond-move", MASK_NO_COND_MOVE, \
111 N_("Disable use of conditional move instructions") }, \
113 { "debug-arg", MASK_DEBUG_ARG, \
114 N_("Debug argument support in compiler") }, \
116 { "debug-stack", MASK_DEBUG_STACK, \
117 N_("Debug stack support in compiler") }, \
119 { "debug-addr", MASK_DEBUG_ADDR, \
120 N_("Debug memory address support in compiler") }, \
122 { "asm-optimize", 0, \
123 N_("Make adjacent short instructions parallel if possible") }, \
125 { "no-asm-optimize", 0, \
126 N_("Do not make adjacent short instructions parallel") }, \
129 N_("Link programs/data to be in external memory by default") }, \
132 N_("Link programs/data to be in external memory by default") }, \
135 N_("Link programs/data to be in onchip memory by default") }, \
137 { "", TARGET_DEFAULT, "" }, \
140 #define TARGET_OPTIONS \
142 {"branch-cost=", &d30v_branch_cost_string, \
143 N_("Change the branch costs within the compiler") }, \
145 {"cond-exec=", &d30v_cond_exec_string, \
146 N_("Change the threshold for conversion to conditional execution") }, \
149 #define TARGET_VERSION fprintf (stderr, " d30v")
151 #define OVERRIDE_OPTIONS override_options ()
153 #define CAN_DEBUG_WITHOUT_FP
158 #define BITS_BIG_ENDIAN 1
160 #define BYTES_BIG_ENDIAN 1
162 #define WORDS_BIG_ENDIAN 1
164 #define BITS_PER_WORD 32
166 #define UNITS_PER_WORD 4
168 #define POINTER_SIZE 32
170 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
172 if (GET_MODE_CLASS (MODE) == MODE_INT \
173 && GET_MODE_SIZE (MODE) < 4) \
177 #define PARM_BOUNDARY 32
179 #define STACK_BOUNDARY 64
181 #define FUNCTION_BOUNDARY 64
183 #define BIGGEST_ALIGNMENT 64
185 /* Defined in svr4.h. */
186 /* #define MAX_OFILE_ALIGNMENT */
188 #define DATA_ALIGNMENT(TYPE, ALIGN) \
189 (TREE_CODE (TYPE) == ARRAY_TYPE \
190 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
191 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
193 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
194 (TREE_CODE (EXP) == STRING_CST \
195 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
197 #define STRICT_ALIGNMENT 1
199 /* Defined in svr4.h. */
201 #define PCC_BITFIELD_TYPE_MATTERS 1
203 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
206 /* Layout of Source Language Data Types */
208 #define INT_TYPE_SIZE 32
210 #define SHORT_TYPE_SIZE 16
212 #define LONG_TYPE_SIZE 32
214 #define LONG_LONG_TYPE_SIZE 64
216 #define CHAR_TYPE_SIZE 8
218 #define FLOAT_TYPE_SIZE 32
220 #define DOUBLE_TYPE_SIZE 64
222 #define LONG_DOUBLE_TYPE_SIZE 64
224 #define DEFAULT_SIGNED_CHAR 1
226 /* Defined in svr4.h. */
227 /* #define SIZE_TYPE */
229 /* Defined in svr4.h. */
230 /* #define PTRDIFF_TYPE */
232 /* Defined in svr4.h. */
233 /* #define WCHAR_TYPE */
235 /* Defined in svr4.h. */
236 /* #define WCHAR_TYPE_SIZE */
239 /* D30V register layout. */
241 /* Return true if a value is inside a range */
242 #define IN_RANGE_P(VALUE, LOW, HIGH) \
243 (((unsigned)((VALUE) - (LOW))) <= ((unsigned)((HIGH) - (LOW))))
245 /* General purpose registers. */
246 #define GPR_FIRST 0 /* First gpr */
247 #define GPR_LAST (GPR_FIRST + 63) /* Last gpr */
248 #define GPR_R0 GPR_FIRST /* R0, constant 0 */
249 #define GPR_ARG_FIRST (GPR_FIRST + 2) /* R2, first argument reg */
250 #define GPR_ARG_LAST (GPR_FIRST + 17) /* R17, last argument reg */
251 #define GPR_RET_VALUE GPR_ARG_FIRST /* R2, function return reg */
252 #define GPR_ATMP_FIRST (GPR_FIRST + 20) /* R20, tmp to save accs */
253 #define GPR_ATMP_LAST (GPR_FIRST + 21) /* R21, tmp to save accs */
254 #define GPR_STACK_TMP (GPR_FIRST + 22) /* R22, tmp for saving stack */
255 #define GPR_RES_FIRST (GPR_FIRST + 32) /* R32, first reserved reg */
256 #define GPR_RES_LAST (GPR_FIRST + 35) /* R35, last reserved reg */
257 #define GPR_FP (GPR_FIRST + 61) /* Frame pointer */
258 #define GPR_LINK (GPR_FIRST + 62) /* Return address register */
259 #define GPR_SP (GPR_FIRST + 63) /* Stack pointer */
261 /* Argument register that is eliminated in favor of the frame and/or stack
262 pointer. Also add register to point to where the return address is
264 #define SPECIAL_REG_FIRST (GPR_LAST + 1)
265 #define SPECIAL_REG_LAST (SPECIAL_REG_FIRST)
266 #define ARG_POINTER_REGNUM (SPECIAL_REG_FIRST + 0)
267 #define SPECIAL_REG_P(R) ((R) == SPECIAL_REG_FIRST)
269 #define GPR_OR_SPECIAL_REG_P(R) IN_RANGE_P (R, GPR_FIRST, SPECIAL_REG_LAST)
270 #define GPR_P(R) IN_RANGE_P (R, GPR_FIRST, GPR_LAST)
271 #define GPR_OR_PSEUDO_P(R) (GPR_OR_SPECIAL_REG_P (R) \
272 || (R) >= FIRST_PSEUDO_REGISTER)
275 #define FLAG_FIRST (SPECIAL_REG_LAST + 1) /* First flag */
276 #define FLAG_LAST (FLAG_FIRST + 7) /* Last flag */
277 #define FLAG_F0 (FLAG_FIRST) /* F0, used in prediction */
278 #define FLAG_F1 (FLAG_FIRST + 1) /* F1, used in prediction */
279 #define FLAG_F2 (FLAG_FIRST + 2) /* F2, general flag */
280 #define FLAG_F3 (FLAG_FIRST + 3) /* F3, general flag */
281 #define FLAG_SAT (FLAG_FIRST + 4) /* F4, saturation flag */
282 #define FLAG_OVERFLOW (FLAG_FIRST + 5) /* F5, overflow flag */
283 #define FLAG_ACC_OVER (FLAG_FIRST + 6) /* F6, accumulated overflow */
284 #define FLAG_CARRY (FLAG_FIRST + 7) /* F7, carry/borrow flag */
285 #define FLAG_BORROW FLAG_CARRY
287 #define FLAG_P(R) IN_RANGE_P (R, FLAG_FIRST, FLAG_LAST)
288 #define FLAG_OR_PSEUDO_P(R) (FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
290 #define BR_FLAG_P(R) IN_RANGE_P (R, FLAG_F0, FLAG_F1)
291 #define BR_FLAG_OR_PSEUDO_P(R) (BR_FLAG_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
294 #define ACCUM_FIRST (FLAG_LAST + 1) /* First accumulator */
295 #define ACCUM_A0 ACCUM_FIRST /* Register A0 */
296 #define ACCUM_A1 (ACCUM_FIRST + 1) /* Register A1 */
297 #define ACCUM_LAST (ACCUM_FIRST + 1) /* Last accumulator */
299 #define ACCUM_P(R) IN_RANGE_P (R, ACCUM_FIRST, ACCUM_LAST)
300 #define ACCUM_OR_PSEUDO_P(R) (ACCUM_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
302 /* Special registers. Note, we only define the registers that can actually
304 #define CR_FIRST (ACCUM_LAST + 1) /* First CR */
305 #define CR_LAST (CR_FIRST + 14) /* Last CR */
306 #define CR_PSW (CR_FIRST + 0) /* CR0, Program status word */
307 #define CR_BPSW (CR_FIRST + 1) /* CR1, Backup PSW */
308 #define CR_PC (CR_FIRST + 2) /* CR2, Program counter */
309 #define CR_BPC (CR_FIRST + 3) /* CR3, Backup PC */
310 #define CR_DPSW (CR_FIRST + 4) /* CR4, Debug PSW */
311 #define CR_DPC (CR_FIRST + 5) /* CR5, Debug PC */
312 #define CR_RPT_C (CR_FIRST + 6) /* CR7, loop count register */
313 #define CR_RPT_S (CR_FIRST + 7) /* CR8, loop start address */
314 #define CR_RPT_E (CR_FIRST + 8) /* CR9, loop end address */
315 #define CR_MOD_S (CR_FIRST + 9) /* CR10, modulo address start*/
316 #define CR_MOD_E (CR_FIRST + 10) /* CR11, modulo address */
317 #define CR_IBA (CR_FIRST + 11) /* CR14, Interrupt break addr */
318 #define CR_EIT_VB (CR_FIRST + 12) /* CR15, EIT vector address */
319 #define CR_INT_S (CR_FIRST + 13) /* CR16, Interrupt status */
320 #define CR_INT_M (CR_FIRST + 14) /* CR17, Interrupt mask */
322 #define CR_P(R) IN_RANGE_P (R, CR_FIRST, CR_LAST)
323 #define CR_OR_PSEUDO_P(R) (CR_P (R) || (R) >= FIRST_PSEUDO_REGISTER)
326 /* Register Basics */
328 /* Number of hardware registers known to the compiler. They receive numbers 0
329 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
330 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
331 #define FIRST_PSEUDO_REGISTER (CR_LAST + 1)
333 /* An initializer that says which registers are used for fixed purposes all
334 throughout the compiled code and are therefore not available for general
335 allocation. These would include the stack pointer, the frame pointer
336 (except on machines where that can be used as a general register when no
337 frame pointer is needed), the program counter on machines where that is
338 considered one of the addressable registers, and any other numbered register
341 This information is expressed as a sequence of numbers, separated by commas
342 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
345 The table initialized from this macro, and the table initialized by the
346 following one, may be overridden at run time either automatically, by the
347 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
348 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
349 #define FIXED_REGISTERS \
351 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R0 - R15 */ \
352 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
353 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
354 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
356 0, 0, 0, 0, 1, 1, 1, 1, /* F0 - F7 */ \
357 0, 0, /* A0 - A1 */ \
358 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
361 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
362 general) by function calls as well as for fixed registers. This macro
363 therefore identifies the registers that are not available for general
364 allocation of values that must live across function calls.
366 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
367 saves it on function entry and restores it on function exit, if the register
368 is used within the function. */
369 #define CALL_USED_REGISTERS \
371 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R0 - R15 */ \
372 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* R16 - R31 */ \
373 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* R32 - R47 */ \
374 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* R48 - R63 */ \
376 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - F7 */ \
377 1, 0, /* A0 - A1 */ \
378 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* CRs */ \
381 /* Zero or more C statements that may conditionally modify two variables
382 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
383 been initialized from the two preceding macros.
385 This is necessary in case the fixed or call-clobbered registers depend on
388 You need not define this macro if it has no work to do.
390 If the usage of an entire class of registers depends on the target flags,
391 you may indicate this to GCC by using this macro to modify `fixed_regs' and
392 `call_used_regs' to 1 for each of the registers in the classes which should
393 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
394 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
396 (However, if this class is not included in `GENERAL_REGS' and all of the
397 insn patterns whose constraints permit this class are controlled by target
398 switches, then GCC will automatically avoid using these registers when the
399 target switches are opposed to them.) */
400 /* #define CONDITIONAL_REGISTER_USAGE */
402 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
403 related functions fail to save the registers, or that `longjmp' fails to
404 restore them. To compensate, the compiler avoids putting variables in
405 registers in functions that use `setjmp'. */
406 /* #define NON_SAVING_SETJMP */
408 /* Define this macro if the target machine has register windows. This C
409 expression returns the register number as seen by the called function
410 corresponding to the register number OUT as seen by the calling function.
411 Return OUT if register number OUT is not an outbound register. */
412 /* #define INCOMING_REGNO(OUT) */
414 /* Define this macro if the target machine has register windows. This C
415 expression returns the register number as seen by the calling function
416 corresponding to the register number IN as seen by the called function.
417 Return IN if register number IN is not an inbound register. */
418 /* #define OUTGOING_REGNO(IN) */
421 /* Order of allocation of registers */
423 /* If defined, an initializer for a vector of integers, containing the numbers
424 of hard registers in the order in which GNU CC should prefer to use them
425 (from most preferred to least).
427 If this macro is not defined, registers are used lowest numbered first (all
430 One use of this macro is on machines where the highest numbered registers
431 must always be saved and the save-multiple-registers instruction supports
432 only sequences of consecutive registers. On such machines, define
433 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
434 allocatable register first. */
436 #define REG_ALLOC_ORDER \
438 /* volatile registers */ \
439 GPR_FIRST + 2, GPR_FIRST + 3, GPR_FIRST + 4, GPR_FIRST + 5, \
440 GPR_FIRST + 6, GPR_FIRST + 7, GPR_FIRST + 8, GPR_FIRST + 9, \
441 GPR_FIRST + 10, GPR_FIRST + 11, GPR_FIRST + 12, GPR_FIRST + 13, \
442 GPR_FIRST + 14, GPR_FIRST + 15, GPR_FIRST + 16, GPR_FIRST + 17, \
443 GPR_FIRST + 18, GPR_FIRST + 19, GPR_FIRST + 20, GPR_FIRST + 21, \
444 GPR_FIRST + 22, GPR_FIRST + 23, GPR_FIRST + 24, GPR_FIRST + 25, \
447 /* saved registers */ \
448 GPR_FIRST + 34, GPR_FIRST + 35, GPR_FIRST + 36, GPR_FIRST + 37, \
449 GPR_FIRST + 38, GPR_FIRST + 39, GPR_FIRST + 40, GPR_FIRST + 41, \
450 GPR_FIRST + 42, GPR_FIRST + 43, GPR_FIRST + 44, GPR_FIRST + 45, \
451 GPR_FIRST + 46, GPR_FIRST + 47, GPR_FIRST + 48, GPR_FIRST + 49, \
452 GPR_FIRST + 50, GPR_FIRST + 51, GPR_FIRST + 52, GPR_FIRST + 53, \
453 GPR_FIRST + 54, GPR_FIRST + 55, GPR_FIRST + 56, GPR_FIRST + 57, \
454 GPR_FIRST + 58, GPR_FIRST + 59, GPR_FIRST + 60, GPR_FIRST + 61, \
458 FLAG_F2, FLAG_F3, FLAG_F0, FLAG_F1, \
459 FLAG_SAT, FLAG_OVERFLOW, FLAG_ACC_OVER, FLAG_CARRY, \
462 ACCUM_FIRST + 0, ACCUM_FIRST + 1, \
464 /* fixed registers */ \
465 GPR_FIRST + 0, GPR_FIRST + 26, GPR_FIRST + 27, GPR_FIRST + 28, \
466 GPR_FIRST + 29, GPR_FIRST + 30, GPR_FIRST + 31, GPR_FIRST + 32, \
467 GPR_FIRST + 33, GPR_FIRST + 63, \
468 CR_PSW, CR_BPSW, CR_PC, CR_BPC, \
469 CR_DPSW, CR_DPC, CR_RPT_C, CR_RPT_S, \
470 CR_RPT_E, CR_MOD_S, CR_MOD_E, CR_IBA, \
471 CR_EIT_VB, CR_INT_S, CR_INT_M, \
472 ARG_POINTER_REGNUM, \
475 /* A C statement (sans semicolon) to choose the order in which to allocate hard
476 registers for pseudo-registers local to a basic block.
478 Store the desired register order in the array `reg_alloc_order'. Element 0
479 should be the register to allocate first; element 1, the next register; and
482 The macro body should not assume anything about the contents of
483 `reg_alloc_order' before execution of the macro.
485 On most machines, it is not necessary to define this macro. */
486 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
489 /* How Values Fit in Registers */
491 /* A C expression for the number of consecutive hard registers, starting at
492 register number REGNO, required to hold a value of mode MODE.
494 On a machine where all registers are exactly one word, a suitable definition
497 #define HARD_REGNO_NREGS(REGNO, MODE) \
498 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
499 / UNITS_PER_WORD)) */
501 #define HARD_REGNO_NREGS(REGNO, MODE) \
502 (ACCUM_P (REGNO) ? ((GET_MODE_SIZE (MODE) + 2*UNITS_PER_WORD - 1) \
503 / (2*UNITS_PER_WORD)) \
504 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
507 /* A C expression that is nonzero if it is permissible to store a value of mode
508 MODE in hard register number REGNO (or in several registers starting with
509 that one). For a machine where all registers are equivalent, a suitable
512 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
514 It is not necessary for this macro to check for the numbers of fixed
515 registers, because the allocation mechanism considers them to be always
518 On some machines, double-precision values must be kept in even/odd register
519 pairs. The way to implement that is to define this macro to reject odd
520 register numbers for such modes.
522 The minimum requirement for a mode to be OK in a register is that the
523 `movMODE' instruction pattern support moves between the register and any
524 other hard register for which the mode is OK; and that moving a value into
525 the register and back out not alter it.
527 Since the same instruction used to move `SImode' will work for all narrower
528 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
529 to distinguish between these modes, provided you define patterns `movhi',
530 etc., to take advantage of this. This is useful because of the interaction
531 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
532 all integer modes to be tieable.
534 Many machines have special registers for floating point arithmetic. Often
535 people assume that floating point machine modes are allowed only in floating
536 point registers. This is not true. Any registers that can hold integers
537 can safely *hold* a floating point machine mode, whether or not floating
538 arithmetic can be done on it in those registers. Integer move instructions
539 can be used to move the values.
541 On some machines, though, the converse is true: fixed-point machine modes
542 may not go in floating registers. This is true if the floating registers
543 normalize any value stored in them, because storing a non-floating value
544 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
545 fixed-point machine modes in floating registers. But if the floating
546 registers do not automatically normalize, if you can store any bit pattern
547 in one and retrieve it unchanged without a trap, then any machine mode may
548 go in a floating register, so you can define this macro to say so.
550 The primary significance of special floating registers is rather that they
551 are the registers acceptable in floating point arithmetic instructions.
552 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
553 writing the proper constraints for those instructions.
555 On some machines, the floating registers are especially slow to access, so
556 that it is better to store a value in a stack frame than in such a register
557 if floating point arithmetic is not being done. As long as the floating
558 registers are not in class `GENERAL_REGS', they will not be used unless some
559 pattern's constraint asks for one. */
561 extern unsigned char hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
562 #define HARD_REGNO_MODE_OK(REGNO, MODE) hard_regno_mode_ok[ (int)MODE ][ REGNO ]
564 /* A C expression that is nonzero if it is desirable to choose register
565 allocation so as to avoid move instructions between a value of mode MODE1
566 and a value of mode MODE2.
568 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
569 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
572 extern unsigned char modes_tieable_p[];
573 #define MODES_TIEABLE_P(MODE1, MODE2) \
574 modes_tieable_p[ (((int)(MODE1)) * (NUM_MACHINE_MODES)) + (int)(MODE2) ]
576 /* Define this macro if the compiler should avoid copies to/from CCmode
577 registers. You should only define this macro if support fo copying to/from
578 CCmode is incomplete. */
580 /* On the D30V, copying to/from CCmode is complete, but since there are only
581 two CC registers usable for conditional tests, this helps gcse not compound
582 the reload problem. */
583 #define AVOID_CCMODE_COPIES
586 /* Handling Leaf Functions */
588 /* A C initializer for a vector, indexed by hard register number, which
589 contains 1 for a register that is allowable in a candidate for leaf function
592 If leaf function treatment involves renumbering the registers, then the
593 registers marked here should be the ones before renumbering--those that GNU
594 CC would ordinarily allocate. The registers which will actually be used in
595 the assembler code, after renumbering, should not be marked with 1 in this
598 Define this macro only if the target machine offers a way to optimize the
599 treatment of leaf functions. */
600 /* #define LEAF_REGISTERS */
602 /* A C expression whose value is the register number to which REGNO should be
603 renumbered, when a function is treated as a leaf function.
605 If REGNO is a register number which should not appear in a leaf function
606 before renumbering, then the expression should yield -1, which will cause
607 the compiler to abort.
609 Define this macro only if the target machine offers a way to optimize the
610 treatment of leaf functions, and registers need to be renumbered to do this. */
611 /* #define LEAF_REG_REMAP(REGNO) */
614 /* Registers That Form a Stack. */
616 /* Define this if the machine has any stack-like registers. */
617 /* #define STACK_REGS */
619 /* The number of the first stack-like register. This one is the top
621 /* #define FIRST_STACK_REG */
623 /* The number of the last stack-like register. This one is the
624 bottom of the stack. */
625 /* #define LAST_STACK_REG */
628 /* Register Classes */
630 /* An enumeral type that must be defined with all the register class names as
631 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
632 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
633 which is not a register class but rather tells how many classes there are.
635 Each register class has a number, which is the value of casting the class
636 name to type `int'. The number serves as an index in many of the tables
655 #define GENERAL_REGS GPR_REGS
657 /* The number of distinct register classes, defined as follows:
659 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
660 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
662 /* An initializer containing the names of the register classes as C string
663 constants. These names are used in writing some of the debugging dumps. */
664 #define REG_CLASS_NAMES \
680 /* Create mask bits for 3rd word of REG_CLASS_CONTENTS */
681 #define MASK_WORD3(REG) ((long)1 << ((REG) - 64))
684 #define REPEAT_MASK MASK_WORD3 (CR_RPT_C)
685 #define CR_MASK (MASK_WORD3 (CR_PSW) | MASK_WORD3 (CR_BPSW) \
686 | MASK_WORD3 (CR_PC) | MASK_WORD3 (CR_BPC) \
687 | MASK_WORD3 (CR_DPSW) | MASK_WORD3 (CR_DPC) \
688 | MASK_WORD3 (CR_RPT_C) | MASK_WORD3 (CR_RPT_S) \
689 | MASK_WORD3 (CR_RPT_E) | MASK_WORD3 (CR_MOD_S) \
690 | MASK_WORD3 (CR_MOD_E) | MASK_WORD3 (CR_IBA) \
691 | MASK_WORD3 (CR_EIT_VB) | MASK_WORD3 (CR_INT_S) \
692 | MASK_WORD3 (CR_INT_M))
694 #define ACCUM_MASK (MASK_WORD3 (ACCUM_A0) | MASK_WORD3 (ACCUM_A1))
695 #define OTHER_FLAG_MASK (MASK_WORD3 (FLAG_F2) | MASK_WORD3 (FLAG_F3) \
696 | MASK_WORD3 (FLAG_SAT) | MASK_WORD3 (FLAG_OVERFLOW) \
697 | MASK_WORD3 (FLAG_ACC_OVER) | MASK_WORD3 (FLAG_CARRY))
699 #define F0_MASK MASK_WORD3 (FLAG_F0)
700 #define F1_MASK MASK_WORD3 (FLAG_F1)
701 #define BR_FLAG_MASK (F0_MASK | F1_MASK)
702 #define FLAG_MASK (BR_FLAG_MASK | OTHER_FLAG_MASK)
703 #define SPECIAL_MASK MASK_WORD3 (ARG_POINTER_REGNUM)
705 #define ALL_MASK (CR_MASK | ACCUM_MASK | FLAG_MASK | SPECIAL_MASK)
707 /* An initializer containing the contents of the register classes, as integers
708 which are bit masks. The Nth integer specifies the contents of class N.
709 The way the integer MASK is interpreted is that register R is in the class
710 if `MASK & (1 << R)' is 1.
712 When the machine has more than 32 registers, an integer does not suffice.
713 Then the integers are replaced by sub-initializers, braced groupings
714 containing several integers. Each sub-initializer must be suitable as an
715 initializer for the type `HARD_REG_SET' which is defined in
717 #define REG_CLASS_CONTENTS \
719 { 0x00000000, 0x00000000, NO_MASK }, /* NO_REGS */ \
720 { 0x00000000, 0x00000000, REPEAT_MASK }, /* REPEAT_REGS */ \
721 { 0x00000000, 0x00000000, CR_MASK }, /* CR_REGS */ \
722 { 0x00000000, 0x00000000, ACCUM_MASK }, /* ACCUM_REGS */ \
723 { 0x00000000, 0x00000000, OTHER_FLAG_MASK }, /* OTHER_FLAG_REGS */ \
724 { 0x00000000, 0x00000000, F0_MASK }, /* F0_REGS */ \
725 { 0x00000000, 0x00000000, F1_MASK }, /* F1_REGS */ \
726 { 0x00000000, 0x00000000, BR_FLAG_MASK }, /* BR_FLAG_REGS */ \
727 { 0x00000000, 0x00000000, FLAG_MASK }, /* FLAG_REGS */ \
728 { 0xfffffffc, 0x3fffffff, NO_MASK }, /* EVEN_REGS */ \
729 { 0xffffffff, 0xffffffff, SPECIAL_MASK }, /* GPR_REGS */ \
730 { 0xffffffff, 0xffffffff, ALL_MASK }, /* ALL_REGS */ \
733 /* A C expression whose value is a register class containing hard register
734 REGNO. In general there is more than one such class; choose a class which
735 is "minimal", meaning that no smaller class also contains the register. */
737 extern enum reg_class regno_reg_class[FIRST_PSEUDO_REGISTER];
738 #define REGNO_REG_CLASS(REGNO) regno_reg_class[ (REGNO) ]
740 /* A macro whose definition is the name of the class to which a valid base
741 register must belong. A base register is one used in an address which is
742 the register value plus a displacement. */
743 #define BASE_REG_CLASS GPR_REGS
745 /* A macro whose definition is the name of the class to which a valid index
746 register must belong. An index register is one used in an address where its
747 value is either multiplied by a scale factor or added to another register
748 (as well as added to a displacement). */
749 #define INDEX_REG_CLASS GPR_REGS
751 /* A C expression which defines the machine-dependent operand constraint
752 letters for register classes. If CHAR is such a letter, the value should be
753 the register class corresponding to it. Otherwise, the value should be
754 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
755 will not be passed to this macro; you do not need to handle it.
757 The following letters are unavailable, due to being used as
762 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
763 'Q', 'R', 'S', 'T', 'U'
765 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
767 extern enum reg_class reg_class_from_letter[256];
768 #define REG_CLASS_FROM_LETTER(CHAR) reg_class_from_letter[(unsigned char)(CHAR)]
770 /* A C expression which is nonzero if register number NUM is suitable for use
771 as a base register in operand addresses. It may be either a suitable hard
772 register or a pseudo register that has been allocated such a hard register. */
774 #define REGNO_OK_FOR_BASE_P(NUM) \
775 ((NUM) < FIRST_PSEUDO_REGISTER \
777 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
780 /* A C expression which is nonzero if register number NUM is suitable for use
781 as an index register in operand addresses. It may be either a suitable hard
782 register or a pseudo register that has been allocated such a hard register.
784 The difference between an index register and a base register is that the
785 index register may be scaled. If an address involves the sum of two
786 registers, neither one of them scaled, then either one may be labeled the
787 "base" and the other the "index"; but whichever labeling is used must fit
788 the machine's constraints of which registers may serve in each capacity.
789 The compiler will try both labelings, looking for one that is valid, and
790 will reload one or both registers only if neither labeling works. */
792 #define REGNO_OK_FOR_INDEX_P(NUM) \
793 ((NUM) < FIRST_PSEUDO_REGISTER \
795 : (reg_renumber[NUM] >= 0 && GPR_P (reg_renumber[NUM])))
797 /* A C expression that places additional restrictions on the register class to
798 use when it is necessary to copy value X into a register in class CLASS.
799 The value is a register class; perhaps CLASS, or perhaps another, smaller
800 class. On many machines, the following definition is safe:
802 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
804 Sometimes returning a more restrictive class makes better code. For
805 example, on the 68000, when X is an integer constant that is in range for a
806 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
807 as CLASS includes the data registers. Requiring a data register guarantees
808 that a `moveq' will be used.
810 If X is a `const_double', by returning `NO_REGS' you can force X into a
811 memory constant. This is useful on certain machines where immediate
812 floating values cannot be loaded into certain kinds of registers. */
813 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
815 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
816 reloads. If you don't define this macro, the default is to use CLASS,
818 /* #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) */
820 /* A C expression that places additional restrictions on the register class to
821 use when it is necessary to be able to hold a value of mode MODE in a reload
822 register for which class CLASS would ordinarily be used.
824 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
825 certain modes that simply can't go in certain reload classes.
827 The value is a register class; perhaps CLASS, or perhaps another, smaller
830 Don't define this macro unless the target machine has limitations which
831 require the macro to do something nontrivial. */
832 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
834 /* Many machines have some registers that cannot be copied directly to or from
835 memory or even from other types of registers. An example is the `MQ'
836 register, which on most machines, can only be copied to or from general
837 registers, but not memory. Some machines allow copying all registers to and
838 from memory, but require a scratch register for stores to some memory
839 locations (e.g., those with symbolic address on the RT, and those with
840 certain symbolic address on the Sparc when compiling PIC). In some cases,
841 both an intermediate and a scratch register are required.
843 You should define these macros to indicate to the reload phase that it may
844 need to allocate at least one register for a reload in addition to the
845 register to contain the data. Specifically, if copying X to a register
846 CLASS in MODE requires an intermediate register, you should define
847 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
848 whose registers can be used as intermediate registers or scratch registers.
850 If copying a register CLASS in MODE to X requires an intermediate or scratch
851 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
852 largest register class required. If the requirements for input and output
853 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
854 instead of defining both macros identically.
856 The values returned by these macros are often `GENERAL_REGS'. Return
857 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
858 to or from a register of CLASS in MODE without requiring a scratch register.
859 Do not define this macro if it would always return `NO_REGS'.
861 If a scratch register is required (either with or without an intermediate
862 register), you should define patterns for `reload_inM' or `reload_outM', as
863 required (*note Standard Names::.. These patterns, which will normally be
864 implemented with a `define_expand', should be similar to the `movM'
865 patterns, except that operand 2 is the scratch register.
867 Define constraints for the reload register and scratch register that contain
868 a single register class. If the original reload register (whose class is
869 CLASS) can meet the constraint given in the pattern, the value returned by
870 these macros is used for the class of the scratch register. Otherwise, two
871 additional reload registers are required. Their classes are obtained from
872 the constraints in the insn pattern.
874 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
875 either be in a hard register or in memory. Use `true_regnum' to find out;
876 it will return -1 if the pseudo is in memory and the hard register number if
879 These macros should not be used in the case where a particular class of
880 registers can only be copied to memory and not to another class of
881 registers. In that case, secondary reload registers are not needed and
882 would not be helpful. Instead, a stack location must be used to perform the
883 copy and the `movM' pattern should use memory as an intermediate storage.
884 This case often occurs between floating-point and general registers. */
886 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
887 ((CLASS) == GPR_REGS ? NO_REGS \
888 : (CLASS) == EVEN_REGS ? NO_REGS \
889 : (CLASS) == ACCUM_REGS ? EVEN_REGS \
892 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
893 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
895 /* Certain machines have the property that some registers cannot be copied to
896 some other registers without using memory. Define this macro on those
897 machines to be a C expression that is non-zero if objects of mode M in
898 registers of CLASS1 can only be copied to registers of class CLASS2 by
899 storing a register of CLASS1 into memory and loading that memory location
900 into a register of CLASS2.
902 Do not define this macro if its value would always be zero. */
903 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
905 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
906 stack slot for a memory location needed for register copies. If this macro
907 is defined, the compiler instead uses the memory location defined by this
910 Do not define this macro if you do not define
911 `SECONDARY_MEMORY_NEEDED'. */
912 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
914 /* When the compiler needs a secondary memory location to copy between two
915 registers of mode MODE, it normally allocates sufficient memory to hold a
916 quantity of `BITS_PER_WORD' bits and performs the store and load operations
917 in a mode that many bits wide and whose class is the same as that of MODE.
919 This is right thing to do on most machines because it ensures that all bits
920 of the register are copied and prevents accesses to the registers in a
921 narrower mode, which some machines prohibit for floating-point registers.
923 However, this default behavior is not correct on some machines, such as the
924 DEC Alpha, that store short integers in floating-point registers differently
925 than in integer registers. On those machines, the default widening will not
926 work correctly and you must define this macro to suppress that widening in
927 some cases. See the file `alpha.h' for details.
929 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
930 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
932 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
934 /* Normally the compiler avoids choosing registers that have been explicitly
935 mentioned in the rtl as spill registers (these registers are normally those
936 used to pass parameters and return values). However, some machines have so
937 few registers of certain classes that there would not be enough registers to
938 use as spill registers if this were done.
940 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
941 these machines. When this macro has a non-zero value, the compiler allows
942 registers explicitly used in the rtl to be used as spill registers but
943 avoids extending the lifetime of these registers.
945 It is always safe to define this macro with a non-zero value, but if you
946 unnecessarily define it, you will reduce the amount of optimizations that
947 can be performed in some cases. If you do not define this macro with a
948 non-zero value when it is required, the compiler will run out of spill
949 registers and print a fatal error message. For most machines, you should
950 not define this macro at all. */
951 /* #define SMALL_REGISTER_CLASSES */
953 /* A C expression whose value is nonzero if pseudos that have been assigned to
954 registers of class CLASS would likely be spilled because registers of CLASS
955 are needed for spill registers.
957 The default value of this macro returns 1 if CLASS has exactly one register
958 and zero otherwise. On most machines, this default should be used. Only
959 define this macro to some other expression if pseudo allocated by
960 `local-alloc.c' end up in memory because their hard registers were needed
961 for spill registers. If this macro returns nonzero for those classes, those
962 pseudos will only be allocated by `global.c', which knows how to reallocate
963 the pseudo to another register. If there would not be another register
964 available for reallocation, you should not change the definition of this
965 macro since the only effect of such a definition would be to slow down
966 register allocation. */
967 #define CLASS_LIKELY_SPILLED_P(CLASS) \
968 ((CLASS) != GPR_REGS && (CLASS) != EVEN_REGS)
970 /* A C expression for the maximum number of consecutive registers of
971 class CLASS needed to hold a value of mode MODE.
973 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
974 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
975 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
977 This macro helps control the handling of multiple-word values in
980 #define CLASS_MAX_NREGS(CLASS, MODE) \
981 (((CLASS) == ACCUM_REGS) \
982 ? ((GET_MODE_SIZE (MODE) + 8 - 1) / 8) \
983 : ((GET_MODE_SIZE (MODE) + 4 - 1) / 4))
985 /* A C expression that defines the machine-dependent operand constraint letters
986 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
987 If C is one of those letters, the expression should check that VALUE, an
988 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
989 is not one of those letters, the value should be 0 regardless of VALUE. */
990 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
991 ((C) == 'I' ? IN_RANGE_P (VALUE, -32, 31) \
992 : (C) == 'J' ? IN_RANGE_P (VALUE, 0, 31) \
993 : (C) == 'K' ? IN_RANGE_P (exact_log2 (VALUE), 0, 31) \
994 : (C) == 'L' ? IN_RANGE_P (exact_log2 (~ (VALUE)), 0, 31) \
995 : (C) == 'M' ? ((VALUE) == 32) \
996 : (C) == 'N' ? ((VALUE) == 1) \
997 : (C) == 'O' ? ((VALUE) == 0) \
998 : (C) == 'P' ? IN_RANGE_P (VALUE, 32, 63) \
1001 /* A C expression that defines the machine-dependent operand constraint letters
1002 (`G', `H') that specify particular ranges of `const_double' values.
1004 If C is one of those letters, the expression should check that VALUE, an RTX
1005 of code `const_double', is in the appropriate range and return 1 if so, 0
1006 otherwise. If C is not one of those letters, the value should be 0
1007 regardless of VALUE.
1009 `const_double' is used for all floating-point constants and for `DImode'
1010 fixed-point constants. A given letter can accept either or both kinds of
1011 values. It can use `GET_MODE' to distinguish between these kinds. */
1012 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
1013 ((C) == 'G' ? (CONST_DOUBLE_LOW (VALUE) == 0 \
1014 && CONST_DOUBLE_HIGH (VALUE) == 0) \
1015 : (C) == 'H' ? FALSE \
1018 /* A C expression that defines the optional machine-dependent constraint
1019 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1020 types of operands, usually memory references, for the target machine.
1021 Normally this macro will not be defined. If it is required for a particular
1022 target machine, it should return 1 if VALUE corresponds to the operand type
1023 represented by the constraint letter C. If C is not defined as an extra
1024 constraint, the value returned should be 0 regardless of VALUE.
1026 For example, on the ROMP, load instructions cannot have their output in r0
1027 if the memory reference contains a symbolic address. Constraint letter `Q'
1028 is defined as representing a memory address that does *not* contain a
1029 symbolic address. An alternative is specified with a `Q' constraint on the
1030 input and `r' on the output. The next alternative specifies `m' on the
1031 input and a register class that does not include r0 on the output. */
1033 #define EXTRA_CONSTRAINT(VALUE, C) \
1034 (((C) == 'Q') ? short_memory_operand ((VALUE), GET_MODE (VALUE)) \
1035 : ((C) == 'R') ? single_reg_memory_operand ((VALUE), GET_MODE (VALUE)) \
1036 : ((C) == 'S') ? const_addr_memory_operand ((VALUE), GET_MODE (VALUE)) \
1037 : ((C) == 'T') ? long_memory_operand ((VALUE), GET_MODE (VALUE)) \
1038 : ((C) == 'U') ? FALSE \
1042 /* Basic Stack Layout */
1046 /* Structure used to define the d30v stack */
1047 typedef struct d30v_stack {
1048 int varargs_p; /* whether this is a varargs function */
1049 int varargs_size; /* size to hold varargs args passed in regs */
1050 int vars_size; /* variable save area size */
1051 int parm_size; /* outgoing parameter size */
1052 int gpr_size; /* size of saved GPR registers */
1053 int accum_size; /* size of saved ACCUM registers */
1054 int total_size; /* total bytes allocated for stack */
1055 /* which registers are to be saved */
1056 int save_offset; /* offset from new sp to start saving vars at */
1057 int link_offset; /* offset r62 is saved at */
1058 int memrefs_varargs; /* # of 2 word memory references for varargs */
1059 int memrefs_2words; /* # of 2 word memory references */
1060 int memrefs_1word; /* # of 1 word memory references */
1061 /* 1 for ldw/stw ops; 2 for ld2w/st2w ops */
1062 unsigned char save_p[FIRST_PSEUDO_REGISTER];
1065 /* Define this macro if pushing a word onto the stack moves the stack pointer
1066 to a smaller address.
1068 When we say, "define this macro if ...," it means that the compiler checks
1069 this macro only with `#ifdef' so the precise definition used does not
1071 #define STACK_GROWS_DOWNWARD 1
1073 /* Define this macro if the addresses of local variable slots are at negative
1074 offsets from the frame pointer. */
1075 /* #define FRAME_GROWS_DOWNWARD */
1077 /* Define this macro if successive arguments to a function occupy decreasing
1078 addresses on the stack. */
1079 /* #define ARGS_GROW_DOWNWARD */
1081 /* Offset from the frame pointer to the first local variable slot to be
1084 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
1085 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
1086 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
1088 #define STARTING_FRAME_OFFSET \
1089 (D30V_ALIGN (current_function_outgoing_args_size, \
1090 (STACK_BOUNDARY / BITS_PER_UNIT)))
1092 /* Offset from the stack pointer register to the first location at which
1093 outgoing arguments are placed. If not specified, the default value of zero
1094 is used. This is the proper value for most machines.
1096 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1097 location at which outgoing arguments are placed. */
1098 /* #define STACK_POINTER_OFFSET */
1100 /* Offset from the argument pointer register to the first argument's address.
1101 On some machines it may depend on the data type of the function.
1103 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1104 argument's address. */
1105 #define FIRST_PARM_OFFSET(FUNDECL) 0
1107 /* Offset from the stack pointer register to an item dynamically allocated on
1108 the stack, e.g., by `alloca'.
1110 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1111 of the outgoing arguments. The default is correct for most machines. See
1112 `function.c' for details. */
1113 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1115 /* A C expression whose value is RTL representing the address in a stack frame
1116 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1117 an RTL expression for the address of the stack frame itself.
1119 If you don't define this macro, the default is to return the value of
1120 FRAMEADDR--that is, the stack frame address is also the address of the stack
1121 word that points to the previous frame. */
1122 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1124 /* If defined, a C expression that produces the machine-specific code to setup
1125 the stack so that arbitrary frames can be accessed. For example, on the
1126 Sparc, we must flush all of the register windows to the stack before we can
1127 access arbitrary stack frames. This macro will seldom need to be defined. */
1128 /* #define SETUP_FRAME_ADDRESSES() */
1130 /* A C expression whose value is RTL representing the value of the return
1131 address for the frame COUNT steps up from the current frame, after the
1132 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1133 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1136 The value of the expression must always be the correct address when COUNT is
1137 zero, but may be `NULL_RTX' if there is not way to determine the return
1138 address of other frames. */
1140 /* ??? This definition fails for leaf functions. There is currently no
1141 general solution for this problem. */
1143 /* ??? There appears to be no way to get the return address of any previous
1144 frame except by disassembling instructions in the prologue/epilogue.
1145 So currently we support only the current frame. */
1147 #define RETURN_ADDR_RTX(COUNT, FRAME) \
1148 ((COUNT) == 0 ? d30v_return_addr() : const0_rtx)
1150 /* Define this if the return address of a particular stack frame is
1151 accessed from the frame pointer of the previous stack frame. */
1152 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1154 /* A C expression whose value is RTL representing the location of the incoming
1155 return address at the beginning of any function, before the prologue. This
1156 RTL is either a `REG', indicating that the return value is saved in `REG',
1157 or a `MEM' representing a location in the stack.
1159 You only need to define this macro if you want to support call frame
1160 debugging information like that provided by DWARF 2. */
1162 /* Before the prologue, RA lives in r62. */
1163 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, GPR_LINK)
1165 /* A C expression whose value is an integer giving the offset, in bytes, from
1166 the value of the stack pointer register to the top of the stack frame at the
1167 beginning of any function, before the prologue. The top of the frame is
1168 defined to be the value of the stack pointer in the previous frame, just
1169 before the call instruction.
1171 You only need to define this macro if you want to support call frame
1172 debugging information like that provided by DWARF 2. */
1173 #define INCOMING_FRAME_SP_OFFSET 0
1175 /* Initialize data used by insn expanders. This is called from insn_emit,
1176 once for every function before code is generated. */
1178 #define INIT_EXPANDERS d30v_init_expanders ()
1181 /* Stack Checking. */
1183 /* A nonzero value if stack checking is done by the configuration files in a
1184 machine-dependent manner. You should define this macro if stack checking is
1185 require by the ABI of your machine or if you would like to have to stack
1186 checking in some more efficient way than GNU CC's portable approach. The
1187 default value of this macro is zero. */
1188 /* #define STACK_CHECK_BUILTIN */
1190 /* An integer representing the interval at which GNU CC must generate stack
1191 probe instructions. You will normally define this macro to be no larger
1192 than the size of the "guard pages" at the end of a stack area. The default
1193 value of 4096 is suitable for most systems. */
1194 /* #define STACK_CHECK_PROBE_INTERVAL */
1196 /* An integer which is nonzero if GNU CC should perform the stack probe as a
1197 load instruction and zero if GNU CC should use a store instruction. The
1198 default is zero, which is the most efficient choice on most systems. */
1199 /* #define STACK_CHECK_PROBE_LOAD */
1201 /* The number of bytes of stack needed to recover from a stack overflow, for
1202 languages where such a recovery is supported. The default value of 75 words
1203 should be adequate for most machines. */
1204 /* #define STACK_CHECK_PROTECT */
1206 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1207 instructions in non-leaf functions to ensure at least this many bytes of
1208 stack are available. If a stack frame is larger than this size, stack
1209 checking will not be reliable and GNU CC will issue a warning. The default
1210 is chosen so that GNU CC only generates one instruction on most systems.
1211 You should normally not change the default value of this macro. */
1212 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1214 /* GNU CC uses this value to generate the above warning message. It represents
1215 the amount of fixed frame used by a function, not including space for any
1216 callee-saved registers, temporaries and user variables. You need only
1217 specify an upper bound for this amount and will normally use the default of
1219 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
1221 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
1222 area of the stack frame when the user specifies `-fstack-check'. GNU CC
1223 computed the default from the values of the above macros and you will
1224 normally not need to override that default. */
1225 /* #define STACK_CHECK_MAX_VAR_SIZE */
1228 /* Register That Address the Stack Frame. */
1230 /* The register number of the stack pointer register, which must also be a
1231 fixed register according to `FIXED_REGISTERS'. On most machines, the
1232 hardware determines which register this is. */
1233 #define STACK_POINTER_REGNUM GPR_SP
1235 /* The register number of the frame pointer register, which is used to access
1236 automatic variables in the stack frame. On some machines, the hardware
1237 determines which register this is. On other machines, you can choose any
1238 register you wish for this purpose. */
1239 #define FRAME_POINTER_REGNUM GPR_FP
1241 /* On some machines the offset between the frame pointer and starting offset of
1242 the automatic variables is not known until after register allocation has
1243 been done (for example, because the saved registers are between these two
1244 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
1245 a special, fixed register to be used internally until the offset is known,
1246 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
1247 used for the frame pointer.
1249 You should define this macro only in the very rare circumstances when it is
1250 not possible to calculate the offset between the frame pointer and the
1251 automatic variables until after register allocation has been completed.
1252 When this macro is defined, you must also indicate in your definition of
1253 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
1254 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
1256 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
1257 /* #define HARD_FRAME_POINTER_REGNUM */
1259 /* The register number of the arg pointer register, which is used to access the
1260 function's argument list. On some machines, this is the same as the frame
1261 pointer register. On some machines, the hardware determines which register
1262 this is. On other machines, you can choose any register you wish for this
1263 purpose. If this is not the same register as the frame pointer register,
1264 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
1265 arrange to be able to eliminate it (*note Elimination::.). */
1266 /* #define ARG_POINTER_REGNUM */
1268 /* The register number of the return address pointer register, which is used to
1269 access the current function's return address from the stack. On some
1270 machines, the return address is not at a fixed offset from the frame pointer
1271 or stack pointer or argument pointer. This register can be defined to point
1272 to the return address on the stack, and then be converted by
1273 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
1275 Do not define this macro unless there is no other way to get the return
1276 address from the stack. */
1277 /* #define RETURN_ADDRESS_POINTER_REGNUM */
1279 /* Register numbers used for passing a function's static chain pointer. If
1280 register windows are used, the register number as seen by the called
1281 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
1282 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
1283 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
1285 The static chain register need not be a fixed register.
1287 If the static chain is passed in memory, these macros should not be defined;
1288 instead, the next two macros should be defined. */
1290 #define STATIC_CHAIN_REGNUM (GPR_FIRST + 18)
1291 /* #define STATIC_CHAIN_INCOMING_REGNUM */
1293 /* If the static chain is passed in memory, these macros provide rtx giving
1294 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
1295 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
1296 functions, respectively. Often the former will be at an offset from the
1297 stack pointer and the latter at an offset from the frame pointer.
1299 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
1300 `arg_pointer_rtx' will have been initialized prior to the use of these
1301 macros and should be used to refer to those items.
1303 If the static chain is passed in a register, the two previous
1304 macros should be defined instead. */
1305 /* #define STATIC_CHAIN */
1306 /* #define STATIC_CHAIN_INCOMING */
1309 /* Eliminating the Frame Pointer and the Arg Pointer */
1311 /* A C expression which is nonzero if a function must have and use a frame
1312 pointer. This expression is evaluated in the reload pass. If its value is
1313 nonzero the function will have a frame pointer.
1315 The expression can in principle examine the current function and decide
1316 according to the facts, but on most machines the constant 0 or the constant
1317 1 suffices. Use 0 when the machine allows code to be generated with no
1318 frame pointer, and doing so saves some time or space. Use 1 when there is
1319 no possible advantage to avoiding a frame pointer.
1321 In certain cases, the compiler does not know how to produce valid code
1322 without a frame pointer. The compiler recognizes those cases and
1323 automatically gives the function a frame pointer regardless of what
1324 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
1326 In a function that does not require a frame pointer, the frame pointer
1327 register can be allocated for ordinary usage, unless you mark it as a fixed
1328 register. See `FIXED_REGISTERS' for more information. */
1329 #define FRAME_POINTER_REQUIRED 0
1331 /* A C statement to store in the variable DEPTH-VAR the difference between the
1332 frame pointer and the stack pointer values immediately after the function
1333 prologue. The value would be computed from information such as the result
1334 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
1337 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
1338 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
1339 is defined to always be true; in that case, you may set DEPTH-VAR to
1341 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
1343 /* If defined, this macro specifies a table of register pairs used to eliminate
1344 unneeded registers that point into the stack frame. If it is not defined,
1345 the only elimination attempted by the compiler is to replace references to
1346 the frame pointer with references to the stack pointer.
1348 The definition of this macro is a list of structure initializations, each of
1349 which specifies an original and replacement register.
1351 On some machines, the position of the argument pointer is not known until
1352 the compilation is completed. In such a case, a separate hard register must
1353 be used for the argument pointer. This register can be eliminated by
1354 replacing it with either the frame pointer or the argument pointer,
1355 depending on whether or not the frame pointer has been eliminated.
1357 In this case, you might specify:
1358 #define ELIMINABLE_REGS \
1359 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1360 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
1361 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
1363 Note that the elimination of the argument pointer with the stack pointer is
1364 specified first since that is the preferred elimination. */
1365 #define ELIMINABLE_REGS \
1367 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
1368 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \
1369 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } \
1372 /* A C expression that returns non-zero if the compiler is allowed to try to
1373 replace register number FROM-REG with register number TO-REG. This macro
1374 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
1375 the constant 1, since most of the cases preventing register elimination are
1376 things that the compiler already knows about. */
1378 #define CAN_ELIMINATE(FROM, TO) \
1379 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1380 ? ! frame_pointer_needed \
1383 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
1384 initial difference between the specified pair of registers. This macro must
1385 be defined if `ELIMINABLE_REGS' is defined. */
1387 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1389 d30v_stack_t *info = d30v_stack_info (); \
1391 if ((FROM) == FRAME_POINTER_REGNUM) \
1393 else if ((FROM) == ARG_POINTER_REGNUM) \
1394 (OFFSET) = info->total_size - current_function_pretend_args_size; \
1400 /* Passing Function Arguments on the Stack */
1402 /* Define this macro if an argument declared in a prototype as an integral type
1403 smaller than `int' should actually be passed as an `int'. In addition to
1404 avoiding errors in certain cases of mismatch, it also makes for better code
1405 on certain machines. */
1406 /* #define PROMOTE_PROTOTYPES */
1408 /* A C expression that is the number of bytes actually pushed onto the stack
1409 when an instruction attempts to push NPUSHED bytes.
1411 If the target machine does not have a push instruction, do not define this
1412 macro. That directs GNU CC to use an alternate strategy: to allocate the
1413 entire argument block and then store the arguments into it.
1415 On some machines, the definition
1417 #define PUSH_ROUNDING(BYTES) (BYTES)
1419 will suffice. But on other machines, instructions that appear to push one
1420 byte actually push two bytes in an attempt to maintain alignment. Then the
1421 definition should be
1423 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1424 /* #define PUSH_ROUNDING(NPUSHED) */
1426 /* If defined, the maximum amount of space required for outgoing arguments will
1427 be computed and placed into the variable
1428 `current_function_outgoing_args_size'. No space will be pushed onto the
1429 stack for each call; instead, the function prologue should increase the
1430 stack frame size by this amount.
1432 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
1434 #define ACCUMULATE_OUTGOING_ARGS 1
1436 /* Define this macro if functions should assume that stack space has been
1437 allocated for arguments even when their values are passed in registers.
1439 The value of this macro is the size, in bytes, of the area reserved for
1440 arguments passed in registers for the function represented by FNDECL.
1442 This space can be allocated by the caller, or be a part of the
1443 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1445 /* #define REG_PARM_STACK_SPACE(FNDECL) */
1447 /* Define these macros in addition to the one above if functions might allocate
1448 stack space for arguments even when their values are passed in registers.
1449 These should be used when the stack space allocated for arguments in
1450 registers is not a simple constant independent of the function declaration.
1452 The value of the first macro is the size, in bytes, of the area that we
1453 should initially assume would be reserved for arguments passed in registers.
1455 The value of the second macro is the actual size, in bytes, of the area that
1456 will be reserved for arguments passed in registers. This takes two
1457 arguments: an integer representing the number of bytes of fixed sized
1458 arguments on the stack, and a tree representing the number of bytes of
1459 variable sized arguments on the stack.
1461 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
1462 for libcall functions, the current function, or for a function being called
1463 when it is known that such stack space must be allocated. In each case this
1464 value can be easily computed.
1466 When deciding whether a called function needs such stack space, and how much
1467 space to reserve, GNU CC uses these two macros instead of
1468 `REG_PARM_STACK_SPACE'. */
1469 /* #define MAYBE_REG_PARM_STACK_SPACE */
1470 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
1472 /* Define this if it is the responsibility of the caller to allocate the area
1473 reserved for arguments passed in registers.
1475 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
1476 space for these arguments counts in the value of
1477 `current_function_outgoing_args_size'. */
1478 /* #define OUTGOING_REG_PARM_STACK_SPACE */
1480 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
1481 parameters don't skip the area specified by it.
1483 Normally, when a parameter is not passed in registers, it is placed on the
1484 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
1485 suppresses this behavior and causes the parameter to be passed on the stack
1486 in its natural location. */
1487 /* #define STACK_PARMS_IN_REG_PARM_AREA */
1489 /* A C expression that should indicate the number of bytes of its own arguments
1490 that a function pops on returning, or 0 if the function pops no arguments
1491 and the caller must therefore pop them all after the function returns.
1493 FUNDECL is a C variable whose value is a tree node that describes the
1494 function in question. Normally it is a node of type `FUNCTION_DECL' that
1495 describes the declaration of the function. From this it is possible to
1496 obtain the DECL_ATTRIBUTES of the function.
1498 FUNTYPE is a C variable whose value is a tree node that describes the
1499 function in question. Normally it is a node of type `FUNCTION_TYPE' that
1500 describes the data type of the function. From this it is possible to obtain
1501 the data types of the value and arguments (if known).
1503 When a call to a library function is being considered, FUNTYPE will contain
1504 an identifier node for the library function. Thus, if you need to
1505 distinguish among various library functions, you can do so by their names.
1506 Note that "library function" in this context means a function used to
1507 perform arithmetic, whose name is known specially in the compiler and was
1508 not mentioned in the C code being compiled.
1510 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
1511 variable number of bytes is passed, it is zero, and argument popping will
1512 always be the responsibility of the calling function.
1514 On the VAX, all functions always pop their arguments, so the definition of
1515 this macro is STACK-SIZE. On the 68000, using the standard calling
1516 convention, no functions pop their arguments, so the value of the macro is
1517 always 0 in this case. But an alternative calling convention is available
1518 in which functions that take a fixed number of arguments pop them but other
1519 functions (such as `printf') pop nothing (the caller pops all). When this
1520 convention is in use, FUNTYPE is examined to determine whether a function
1521 takes a fixed number of arguments. */
1522 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1525 /* Function Arguments in Registers */
1527 /* A C expression that controls whether a function argument is passed in a
1528 register, and which register.
1530 The arguments are CUM, which summarizes all the previous arguments; MODE,
1531 the machine mode of the argument; TYPE, the data type of the argument as a
1532 tree node or 0 if that is not known (which happens for C support library
1533 functions); and NAMED, which is 1 for an ordinary argument and 0 for
1534 nameless arguments that correspond to `...' in the called function's
1537 The value of the expression should either be a `reg' RTX for the hard
1538 register in which to pass the argument, or zero to pass the argument on the
1541 For machines like the VAX and 68000, where normally all arguments are
1542 pushed, zero suffices as a definition.
1544 The usual way to make the ANSI library `stdarg.h' work on a machine where
1545 some arguments are usually passed in registers, is to cause nameless
1546 arguments to be passed on the stack instead. This is done by making
1547 `FUNCTION_ARG' return 0 whenever NAMED is 0.
1549 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
1550 this macro to determine if this argument is of a type that must be passed in
1551 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
1552 returns non-zero for such an argument, the compiler will abort. If
1553 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
1554 stack and then loaded into a register. */
1556 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1557 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, FALSE)
1559 /* Define this macro if the target machine has "register windows", so that the
1560 register in which a function sees an arguments is not necessarily the same
1561 as the one in which the caller passed the argument.
1563 For such machines, `FUNCTION_ARG' computes the register in which the caller
1564 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
1565 fashion to tell the function being called where the arguments will arrive.
1567 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
1570 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
1571 d30v_function_arg (&CUM, (int)MODE, TYPE, NAMED, TRUE)
1573 /* A C expression for the number of words, at the beginning of an argument,
1574 must be put in registers. The value must be zero for arguments that are
1575 passed entirely in registers or that are entirely pushed on the stack.
1577 On some machines, certain arguments must be passed partially in registers
1578 and partially in memory. On these machines, typically the first N words of
1579 arguments are passed in registers, and the rest on the stack. If a
1580 multi-word argument (a `double' or a structure) crosses that boundary, its
1581 first few words must be passed in registers and the rest must be pushed.
1582 This macro tells the compiler when this occurs, and how many of the words
1583 should go in registers.
1585 `FUNCTION_ARG' for these arguments should return the first register to be
1586 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
1587 the called function. */
1588 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1589 d30v_function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED)
1591 /* A C expression that indicates when an argument must be passed by reference.
1592 If nonzero for an argument, a copy of that argument is made in memory and a
1593 pointer to the argument is passed instead of the argument itself. The
1594 pointer is passed in whatever way is appropriate for passing a pointer to
1597 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
1598 definition of this macro might be
1599 #define FUNCTION_ARG_PASS_BY_REFERENCE\
1600 (CUM, MODE, TYPE, NAMED) \
1601 MUST_PASS_IN_STACK (MODE, TYPE) */
1602 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
1604 /* If defined, a C expression that indicates when it is the called function's
1605 responsibility to make a copy of arguments passed by invisible reference.
1606 Normally, the caller makes a copy and passes the address of the copy to the
1607 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
1608 nonzero, the caller does not make a copy. Instead, it passes a pointer to
1609 the "live" value. The called function must not modify this value. If it
1610 can be determined that the value won't be modified, it need not make a copy;
1611 otherwise a copy must be made. */
1612 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
1614 /* A C type for declaring a variable that is used as the first argument of
1615 `FUNCTION_ARG' and other related values. For some target machines, the type
1616 `int' suffices and can hold the number of bytes of argument so far.
1618 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
1619 that have been passed on the stack. The compiler has other variables to
1620 keep track of that. For target machines on which all arguments are passed
1621 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
1622 however, the data structure must exist and should not be empty, so use
1624 typedef int CUMULATIVE_ARGS;
1626 /* A C statement (sans semicolon) for initializing the variable CUM for the
1627 state at the beginning of the argument list. The variable has type
1628 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
1629 of the function which will receive the args, or 0 if the args are to a
1630 compiler support library function. The value of INDIRECT is nonzero when
1631 processing an indirect call, for example a call through a function pointer.
1632 The value of INDIRECT is zero for a call to an explicitly named function, a
1633 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
1634 arguments for the function being compiled.
1636 When processing a call to a compiler support library function, LIBNAME
1637 identifies which one. It is a `symbol_ref' rtx which contains the name of
1638 the function, as a string. LIBNAME is 0 when an ordinary C function call is
1639 being processed. Thus, each time this macro is called, either LIBNAME or
1640 FNTYPE is nonzero, but never both of them at once. */
1642 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1643 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, INDIRECT, FALSE)
1645 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
1646 arguments for the function being compiled. If this macro is undefined,
1647 `INIT_CUMULATIVE_ARGS' is used instead.
1649 The value passed for LIBNAME is always 0, since library routines with
1650 special calling conventions are never compiled with GNU CC. The argument
1651 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
1653 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
1654 d30v_init_cumulative_args (&CUM, FNTYPE, LIBNAME, FALSE, TRUE)
1656 /* A C statement (sans semicolon) to update the summarizer variable CUM to
1657 advance past an argument in the argument list. The values MODE, TYPE and
1658 NAMED describe that argument. Once this is done, the variable CUM is
1659 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
1661 This macro need not do anything if the argument in question was passed on
1662 the stack. The compiler knows how to track the amount of stack space used
1663 for arguments without any special help. */
1665 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1666 d30v_function_arg_advance (&CUM, (int) MODE, TYPE, NAMED)
1668 /* If defined, a C expression which determines whether, and in which direction,
1669 to pad out an argument with extra space. The value should be of type `enum
1670 direction': either `upward' to pad above the argument, `downward' to pad
1671 below, or `none' to inhibit padding.
1673 The *amount* of padding is always just enough to reach the next multiple of
1674 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
1676 This macro has a default definition which is right for most systems. For
1677 little-endian machines, the default is to pad upward. For big-endian
1678 machines, the default is to pad downward for an argument of constant size
1679 shorter than an `int', and upward otherwise. */
1680 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
1682 /* If defined, a C expression that gives the alignment boundary, in bits, of an
1683 argument with the specified mode and type. If it is not defined,
1684 `PARM_BOUNDARY' is used for all arguments. */
1686 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
1687 d30v_function_arg_boundary ((int) MODE, TYPE)
1689 /* A C expression that is nonzero if REGNO is the number of a hard register in
1690 which function arguments are sometimes passed. This does *not* include
1691 implicit arguments such as the static chain and the structure-value address.
1692 On many machines, no registers can be used for this purpose since all
1693 function arguments are pushed on the stack. */
1695 #define FUNCTION_ARG_REGNO_P(REGNO) \
1696 IN_RANGE_P (REGNO, GPR_ARG_FIRST, GPR_ARG_LAST)
1699 /* How Scalar Function Values are Returned */
1701 /* A C expression to create an RTX representing the place where a function
1702 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
1703 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
1704 represent that type. On many machines, only the mode is relevant.
1705 (Actually, on most machines, scalar values are returned in the same place
1706 regardless of mode).
1708 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
1709 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
1711 If the precise function being called is known, FUNC is a tree node
1712 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
1713 possible to use a different value-returning convention for specific
1714 functions when all their calls are known.
1716 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
1717 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
1718 related macros, below. */
1720 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1721 gen_rtx (REG, TYPE_MODE (VALTYPE), GPR_RET_VALUE)
1723 /* Define this macro if the target machine has "register windows" so that the
1724 register in which a function returns its value is not the same as the one in
1725 which the caller sees the value.
1727 For such machines, `FUNCTION_VALUE' computes the register in which the
1728 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
1729 similar fashion to tell the function where to put the value.
1731 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
1734 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
1735 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
1736 and related macros, below. */
1737 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
1739 /* A C expression to create an RTX representing the place where a library
1740 function returns a value of mode MODE. If the precise function being called
1741 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
1742 null pointer. This makes it possible to use a different value-returning
1743 convention for specific functions when all their calls are known.
1745 Note that "library function" in this context means a compiler support
1746 routine, used to perform arithmetic, whose name is known specially by the
1747 compiler and was not mentioned in the C code being compiled.
1749 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
1750 types, because none of the library functions returns such types. */
1752 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, GPR_RET_VALUE)
1754 /* A C expression that is nonzero if REGNO is the number of a hard register in
1755 which the values of called function may come back.
1757 A register whose use for returning values is limited to serving as the
1758 second of a pair (for a value of type `double', say) need not be recognized
1759 by this macro. So for most machines, this definition suffices:
1761 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1763 If the machine has register windows, so that the caller and the called
1764 function use different registers for the return value, this macro should
1765 recognize only the caller's register numbers. */
1767 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == GPR_RET_VALUE)
1769 /* Define this macro if `untyped_call' and `untyped_return' need more space
1770 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
1771 arbitrary return value. */
1772 /* #define APPLY_RESULT_SIZE */
1775 /* How Large Values are Returned */
1777 /* A C expression which can inhibit the returning of certain function values in
1778 registers, based on the type of value. A nonzero value says to return the
1779 function value in memory, just as large structures are always returned.
1780 Here TYPE will be a C expression of type `tree', representing the data type
1783 Note that values of mode `BLKmode' must be explicitly handled by this macro.
1784 Also, the option `-fpcc-struct-return' takes effect regardless of this
1785 macro. On most systems, it is possible to leave the macro undefined; this
1786 causes a default definition to be used, whose value is the constant 1 for
1787 `BLKmode' values, and 0 otherwise.
1789 Do not use this macro to indicate that structures and unions should always
1790 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
1791 to indicate this. */
1792 /* #define RETURN_IN_MEMORY(TYPE) */
1794 /* Define this macro to be 1 if all structure and union return values must be
1795 in memory. Since this results in slower code, this should be defined only
1796 if needed for compatibility with other compilers or with an ABI. If you
1797 define this macro to be 0, then the conventions used for structure and union
1798 return values are decided by the `RETURN_IN_MEMORY' macro.
1800 If not defined, this defaults to the value 1. */
1801 /* #define DEFAULT_PCC_STRUCT_RETURN */
1803 /* If the structure value address is passed in a register, then
1804 `STRUCT_VALUE_REGNUM' should be the number of that register. */
1806 #define STRUCT_VALUE_REGNUM GPR_ARG_FIRST
1808 /* If the structure value address is not passed in a register, define
1809 `STRUCT_VALUE' as an expression returning an RTX for the place where the
1810 address is passed. If it returns 0, the address is passed as an "invisible"
1813 #define STRUCT_VALUE 0
1815 /* On some architectures the place where the structure value address is found
1816 by the called function is not the same place that the caller put it. This
1817 can be due to register windows, or it could be because the function prologue
1818 moves it to a different place.
1820 If the incoming location of the structure value address is in a register,
1821 define this macro as the register number. */
1822 /* #define STRUCT_VALUE_INCOMING_REGNUM */
1824 /* If the incoming location is not a register, then you should define
1825 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
1826 function should find the value. If it should find the value on the stack,
1827 define this to create a `mem' which refers to the frame pointer. A
1828 definition of 0 means that the address is passed as an "invisible" first
1830 /* #define STRUCT_VALUE_INCOMING */
1832 /* Define this macro if the usual system convention on the target machine for
1833 returning structures and unions is for the called function to return the
1834 address of a static variable containing the value.
1836 Do not define this if the usual system convention is for the caller to pass
1837 an address to the subroutine.
1839 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
1840 when you use `-freg-struct-return' mode. */
1841 /* #define PCC_STATIC_STRUCT_RETURN */
1844 /* Caller-Saves Register Allocation */
1846 /* Define this macro if function calls on the target machine do not preserve
1847 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
1848 registers. This macro enables `-fcaller-saves' by default. Eventually that
1849 option will be enabled by default on all machines and both the option and
1850 this macro will be eliminated. */
1851 /* #define DEFAULT_CALLER_SAVES */
1853 /* A C expression to determine whether it is worthwhile to consider placing a
1854 pseudo-register in a call-clobbered hard register and saving and restoring
1855 it around each function call. The expression should be 1 when this is worth
1856 doing, and 0 otherwise.
1858 If you don't define this macro, a default is used which is good on most
1859 machines: `4 * CALLS < REFS'. */
1860 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
1863 /* #define EXIT_IGNORE_STACK */
1865 /* Define this macro as a C expression that is nonzero for registers
1866 are used by the epilogue or the `return' pattern. The stack and
1867 frame pointer registers are already be assumed to be used as
1869 #define EPILOGUE_USES(REGNO) ((REGNO) == GPR_LINK)
1871 /* Define this macro if the function epilogue contains delay slots to which
1872 instructions from the rest of the function can be "moved". The definition
1873 should be a C expression whose value is an integer representing the number
1874 of delay slots there. */
1875 /* #define DELAY_SLOTS_FOR_EPILOGUE */
1877 /* A C expression that returns 1 if INSN can be placed in delay slot number N
1880 The argument N is an integer which identifies the delay slot now being
1881 considered (since different slots may have different rules of eligibility).
1882 It is never negative and is always less than the number of epilogue delay
1883 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
1884 insn for a given delay slot, in principle, it may be reconsidered for a
1885 subsequent delay slot. Also, other insns may (at least in principle) be
1886 considered for the so far unfilled delay slot.
1888 The insns accepted to fill the epilogue delay slots are put in an
1889 RTL list made with `insn_list' objects, stored in the variable
1890 `current_function_epilogue_delay_list'. The insn for the first
1891 delay slot comes first in the list. Your definition of the function
1892 output_function_epilogue() should fill the delay slots by outputting the
1893 insns in this list, usually by calling `final_scan_insn'.
1895 You need not define this macro if you did not define
1896 `DELAY_SLOTS_FOR_EPILOGUE'. */
1897 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
1899 /* A C compound statement that outputs the assembler code for a thunk function,
1900 used to implement C++ virtual function calls with multiple inheritance. The
1901 thunk acts as a wrapper around a virtual function, adjusting the implicit
1902 object parameter before handing control off to the real function.
1904 First, emit code to add the integer DELTA to the location that contains the
1905 incoming first argument. Assume that this argument contains a pointer, and
1906 is the one used to pass the `this' pointer in C++. This is the incoming
1907 argument *before* the function prologue, e.g. `%o0' on a sparc. The
1908 addition must preserve the values of all other incoming arguments.
1910 After the addition, emit code to jump to FUNCTION, which is a
1911 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
1912 the return address. Hence returning from FUNCTION will return to whoever
1913 called the current `thunk'.
1915 The effect must be as if FUNCTION had been called directly with the
1916 adjusted first argument. This macro is responsible for emitting
1917 all of the code for a thunk function; output_function_prologue()
1918 and output_function_epilogue() are not invoked.
1920 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
1921 extracted from it.) It might possibly be useful on some targets, but
1924 If you do not define this macro, the target-independent code in the C++
1925 frontend will generate a less efficient heavyweight thunk that calls
1926 FUNCTION instead of jumping to it. The generic approach does not support
1928 /* #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) */
1930 /* A C structure for machine-specific, per-function data.
1931 This is added to the cfun structure. */
1932 typedef struct machine_function
1934 /* Additionsl stack adjustment in __builtin_eh_throw. */
1935 struct rtx_def * eh_epilogue_sp_ofs;
1939 /* Generating Code for Profiling. */
1941 /* A C statement or compound statement to output to FILE some assembler code to
1942 call the profiling subroutine `mcount'. Before calling, the assembler code
1943 must load the address of a counter variable into a register where `mcount'
1944 expects to find the address. The name of this variable is `LP' followed by
1945 the number LABELNO, so you would generate the name using `LP%d' in a
1948 The details of how the address should be passed to `mcount' are determined
1949 by your operating system environment, not by GNU CC. To figure them out,
1950 compile a small program for profiling using the system's installed C
1951 compiler and look at the assembler code that results. */
1953 #define FUNCTION_PROFILER(FILE, LABELNO) d30v_function_profiler (FILE, LABELNO)
1955 /* Define this macro if the code for function profiling should come before the
1956 function prologue. Normally, the profiling code comes after. */
1957 /* #define PROFILE_BEFORE_PROLOGUE */
1960 /* Implementing the Varargs Macros. */
1962 /* If defined, is a C expression that produces the machine-specific code for a
1963 call to `__builtin_saveregs'. This code will be moved to the very beginning
1964 of the function, before any parameter access are made. The return value of
1965 this function should be an RTX that contains the value to use as the return
1966 of `__builtin_saveregs'.
1968 If this macro is not defined, the compiler will output an ordinary call to
1969 the library function `__builtin_saveregs'. */
1971 #define EXPAND_BUILTIN_SAVEREGS() d30v_expand_builtin_saveregs ()
1973 /* This macro offers an alternative to using `__builtin_saveregs' and defining
1974 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
1975 arguments into the stack so that all the arguments appear to have been
1976 passed consecutively on the stack. Once this is done, you can use the
1977 standard implementation of varargs that works for machines that pass all
1978 their arguments on the stack.
1980 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
1981 the values that obtain after processing of the named arguments. The
1982 arguments MODE and TYPE describe the last named argument--its machine mode
1983 and its data type as a tree node.
1985 The macro implementation should do two things: first, push onto the stack
1986 all the argument registers *not* used for the named arguments, and second,
1987 store the size of the data thus pushed into the `int'-valued variable whose
1988 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
1989 store here will serve as additional offset for setting up the stack frame.
1991 Because you must generate code to push the anonymous arguments at compile
1992 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
1993 useful on machines that have just a single category of argument register and
1994 use it uniformly for all data types.
1996 If the argument SECOND_TIME is nonzero, it means that the arguments of the
1997 function are being analyzed for the second time. This happens for an inline
1998 function, which is not actually compiled until the end of the source file.
1999 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
2002 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
2003 d30v_setup_incoming_varargs (&ARGS_SO_FAR, (int) MODE, TYPE, \
2004 &PRETEND_ARGS_SIZE, SECOND_TIME)
2006 /* Define this macro if the location where a function argument is passed
2007 depends on whether or not it is a named argument.
2009 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
2010 varargs and stdarg functions. With this macro defined, the NAMED argument
2011 is always true for named arguments, and false for unnamed arguments. If
2012 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
2013 arguments are treated as named. Otherwise, all named arguments except the
2014 last are treated as named. */
2015 /* #define STRICT_ARGUMENT_NAMING */
2017 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
2018 defined, it is assumed that va_list is a void * pointer. */
2020 #define BUILD_VA_LIST_TYPE(VALIST) \
2021 (VALIST) = d30v_build_va_list ()
2024 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
2025 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
2026 variable to initialize. NEXTARG is the machine independent notion of the
2027 'next' argument after the variable arguments. If not defined, a standard
2028 implementation will be defined that works for arguments passed on the stack. */
2030 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
2031 (d30v_expand_builtin_va_start(STDARG_P, VALIST, NEXTARG))
2033 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
2034 va_list as a tree, TYPE is the type passed to va_arg. */
2036 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
2037 (d30v_expand_builtin_va_arg (VALIST, TYPE))
2039 /* Implement the stdarg/varargs va_end macro.
2040 VALIST is the variable of type va_list as a tree. */
2042 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
2046 /* Trampolines for Nested Functions. */
2048 /* A C statement to output, on the stream FILE, assembler code for a block of
2049 data that contains the constant parts of a trampoline. This code should not
2050 include a label--the label is taken care of automatically. */
2051 /* #define TRAMPOLINE_TEMPLATE(FILE) d30v_trampoline_template (FILE) */
2053 /* The name of a subroutine to switch to the section in which the trampoline
2054 template is to be placed (*note Sections::.). The default is a value of
2055 `readonly_data_section', which places the trampoline in the section
2056 containing read-only data. */
2057 /* #define TRAMPOLINE_SECTION */
2059 /* A C expression for the size in bytes of the trampoline, as an integer. */
2060 #define TRAMPOLINE_SIZE (d30v_trampoline_size ())
2062 /* Alignment required for trampolines, in bits.
2064 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
2065 aligning trampolines. */
2066 #define TRAMPOLINE_ALIGNMENT 64
2068 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
2069 RTX for the address of the trampoline; FNADDR is an RTX for the address of
2070 the nested function; STATIC_CHAIN is an RTX for the static chain value that
2071 should be passed to the function when it is called. */
2072 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
2073 d30v_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
2075 /* A C expression to allocate run-time space for a trampoline. The expression
2076 value should be an RTX representing a memory reference to the space for the
2079 If this macro is not defined, by default the trampoline is allocated as a
2080 stack slot. This default is right for most machines. The exceptions are
2081 machines where it is impossible to execute instructions in the stack area.
2082 On such machines, you may have to implement a separate stack, using this
2083 macro in conjunction with output_function_prologue () and
2084 output_function_epilogue ().
2086 FP points to a data structure, a `struct function', which describes the
2087 compilation status of the immediate containing function of the function
2088 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
2089 defined), the stack slot for the trampoline is in the stack frame of this
2090 containing function. Other allocation strategies probably must do something
2091 analogous with this information. */
2092 /* #define ALLOCATE_TRAMPOLINE(FP) */
2094 /* Implementing trampolines is difficult on many machines because they have
2095 separate instruction and data caches. Writing into a stack location fails
2096 to clear the memory in the instruction cache, so when the program jumps to
2097 that location, it executes the old contents.
2099 Here are two possible solutions. One is to clear the relevant parts of the
2100 instruction cache whenever a trampoline is set up. The other is to make all
2101 trampolines identical, by having them jump to a standard subroutine. The
2102 former technique makes trampoline execution faster; the latter makes
2103 initialization faster.
2105 To clear the instruction cache when a trampoline is initialized, define the
2106 following macros which describe the shape of the cache. */
2108 /* The total size in bytes of the cache. */
2109 /* #define INSN_CACHE_SIZE */
2111 /* The length in bytes of each cache line. The cache is divided into cache
2112 lines which are disjoint slots, each holding a contiguous chunk of data
2113 fetched from memory. Each time data is brought into the cache, an entire
2114 line is read at once. The data loaded into a cache line is always aligned
2115 on a boundary equal to the line size. */
2116 /* #define INSN_CACHE_LINE_WIDTH */
2118 /* The number of alternative cache lines that can hold any particular memory
2120 /* #define INSN_CACHE_DEPTH */
2122 /* Alternatively, if the machine has system calls or instructions to clear the
2123 instruction cache directly, you can define the following macro. */
2125 /* If defined, expands to a C expression clearing the *instruction cache* in
2126 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
2127 is defined, some generic code is generated to clear the cache. The
2128 definition of this macro would typically be a series of `asm' statements.
2129 Both BEG and END are both pointer expressions. */
2130 /* #define CLEAR_INSN_CACHE (BEG, END) */
2132 /* To use a standard subroutine, define the following macro. In addition, you
2133 must make sure that the instructions in a trampoline fill an entire cache
2134 line with identical instructions, or else ensure that the beginning of the
2135 trampoline code is always aligned at the same point in its cache line. Look
2136 in `m68k.h' as a guide. */
2138 /* Define this macro if trampolines need a special subroutine to do their work.
2139 The macro should expand to a series of `asm' statements which will be
2140 compiled with GNU CC. They go in a library function named
2141 `__transfer_from_trampoline'.
2143 If you need to avoid executing the ordinary prologue code of a compiled C
2144 function when you jump to the subroutine, you can do so by placing a special
2145 label of your own in the assembler code. Use one `asm' statement to
2146 generate an assembler label, and another to make the label global. Then
2147 trampolines can use that label to jump directly to your special assembler
2149 /* #define TRANSFER_FROM_TRAMPOLINE */
2152 /* Implicit Calls to Library Routines */
2154 /* A C string constant giving the name of the function to call for
2155 multiplication of one signed full-word by another. If you do not define
2156 this macro, the default name is used, which is `__mulsi3', a function
2157 defined in `libgcc.a'. */
2158 /* #define MULSI3_LIBCALL */
2160 /* A C string constant giving the name of the function to call for division of
2161 one signed full-word by another. If you do not define this macro, the
2162 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
2163 /* #define DIVSI3_LIBCALL */
2165 /* A C string constant giving the name of the function to call for division of
2166 one unsigned full-word by another. If you do not define this macro, the
2167 default name is used, which is `__udivsi3', a function defined in
2169 /* #define UDIVSI3_LIBCALL */
2171 /* A C string constant giving the name of the function to call for the
2172 remainder in division of one signed full-word by another. If you do not
2173 define this macro, the default name is used, which is `__modsi3', a function
2174 defined in `libgcc.a'. */
2175 /* #define MODSI3_LIBCALL */
2177 /* A C string constant giving the name of the function to call for the
2178 remainder in division of one unsigned full-word by another. If you do not
2179 define this macro, the default name is used, which is `__umodsi3', a
2180 function defined in `libgcc.a'. */
2181 /* #define UMODSI3_LIBCALL */
2183 /* A C string constant giving the name of the function to call for
2184 multiplication of one signed double-word by another. If you do not define
2185 this macro, the default name is used, which is `__muldi3', a function
2186 defined in `libgcc.a'. */
2187 /* #define MULDI3_LIBCALL */
2189 /* A C string constant giving the name of the function to call for division of
2190 one signed double-word by another. If you do not define this macro, the
2191 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
2192 /* #define DIVDI3_LIBCALL */
2194 /* A C string constant giving the name of the function to call for division of
2195 one unsigned full-word by another. If you do not define this macro, the
2196 default name is used, which is `__udivdi3', a function defined in
2198 /* #define UDIVDI3_LIBCALL */
2200 /* A C string constant giving the name of the function to call for the
2201 remainder in division of one signed double-word by another. If you do not
2202 define this macro, the default name is used, which is `__moddi3', a function
2203 defined in `libgcc.a'. */
2204 /* #define MODDI3_LIBCALL */
2206 /* A C string constant giving the name of the function to call for the
2207 remainder in division of one unsigned full-word by another. If you do not
2208 define this macro, the default name is used, which is `__umoddi3', a
2209 function defined in `libgcc.a'. */
2210 /* #define UMODDI3_LIBCALL */
2212 /* Define this macro as a C statement that declares additional library routines
2213 renames existing ones. `init_optabs' calls this macro after initializing all
2214 the normal library routines. */
2215 /* #define INIT_TARGET_OPTABS */
2217 /* The value of `EDOM' on the target machine, as a C integer constant
2218 expression. If you don't define this macro, GNU CC does not attempt to
2219 deposit the value of `EDOM' into `errno' directly. Look in
2220 `/usr/include/errno.h' to find the value of `EDOM' on your system.
2222 If you do not define `TARGET_EDOM', then compiled code reports domain errors
2223 by calling the library function and letting it report the error. If
2224 mathematical functions on your system use `matherr' when there is an error,
2225 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
2227 /* #define TARGET_EDOM */
2229 /* Define this macro as a C expression to create an rtl expression that refers
2230 to the global "variable" `errno'. (On certain systems, `errno' may not
2231 actually be a variable.) If you don't define this macro, a reasonable
2233 /* #define GEN_ERRNO_RTX */
2235 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
2236 C) library functions `memcpy' and `memset' rather than the BSD functions
2237 `bcopy' and `bzero'.
2239 Defined in svr4.h. */
2240 /* #define TARGET_MEM_FUNCTIONS */
2242 /* Define this macro to generate code for Objective C message sending using the
2243 calling convention of the NeXT system. This calling convention involves
2244 passing the object, the selector and the method arguments all at once to the
2245 method-lookup library function.
2247 The default calling convention passes just the object and the selector to
2248 the lookup function, which returns a pointer to the method. */
2249 /* #define NEXT_OBJC_RUNTIME */
2252 /* Addressing Modes */
2254 /* Define this macro if the machine supports post-increment addressing. */
2255 #define HAVE_POST_INCREMENT 1
2257 /* Similar for other kinds of addressing. */
2258 /* #define HAVE_PRE_INCREMENT 0 */
2259 #define HAVE_POST_DECREMENT 1
2260 /* #define HAVE_PRE_DECREMENT 0 */
2262 /* A C expression that is 1 if the RTX X is a constant which is a valid
2263 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
2264 few machines are more restrictive in which constant addresses are supported.
2266 `CONSTANT_P' accepts integer-values expressions whose values are not
2267 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
2268 and `const' arithmetic expressions, in addition to `const_int' and
2269 `const_double' expressions. */
2270 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
2272 /* A number, the maximum number of registers that can appear in a valid memory
2273 address. Note that it is up to you to specify a value equal to the maximum
2274 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
2275 #define MAX_REGS_PER_ADDRESS 2
2277 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
2278 RTX) is a legitimate memory address on the target machine for a memory
2279 operand of mode MODE.
2281 It usually pays to define several simpler macros to serve as subroutines for
2282 this one. Otherwise it may be too complicated to understand.
2284 This macro must exist in two variants: a strict variant and a non-strict
2285 one. The strict variant is used in the reload pass. It must be defined so
2286 that any pseudo-register that has not been allocated a hard register is
2287 considered a memory reference. In contexts where some kind of register is
2288 required, a pseudo-register with no hard register must be rejected.
2290 The non-strict variant is used in other passes. It must be defined to
2291 accept all pseudo-registers in every context where some kind of register is
2294 Compiler source files that want to use the strict variant of this macro
2295 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
2296 conditional to define the strict variant in that case and the non-strict
2299 Subroutines to check for acceptable registers for various purposes (one for
2300 base registers, one for index registers, and so on) are typically among the
2301 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
2302 subroutine macros need have two variants; the higher levels of macros may be
2303 the same whether strict or not.
2305 Normally, constant addresses which are the sum of a `symbol_ref' and an
2306 integer are stored inside a `const' RTX to mark them as constant.
2307 Therefore, there is no need to recognize such sums specifically as
2308 legitimate addresses. Normally you would simply recognize any `const' as
2311 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
2312 are not marked with `const'. It assumes that a naked `plus' indicates
2313 indexing. If so, then you *must* reject such naked constant sums as
2314 illegitimate addresses, so that none of them will be given to
2315 `PRINT_OPERAND_ADDRESS'.
2317 On some machines, whether a symbolic address is legitimate depends on the
2318 section that the address refers to. On these machines, define the macro
2319 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
2320 then check for it here. When you see a `const', you will have to look
2321 inside it to find the `symbol_ref' in order to determine the section. *Note
2324 The best way to modify the name string is by adding text to the beginning,
2325 with suitable punctuation to prevent any ambiguity. Allocate the new name
2326 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
2327 remove and decode the added text and output the name accordingly, and define
2328 `STRIP_NAME_ENCODING' to access the original name string.
2330 You can check the information stored here into the `symbol_ref' in the
2331 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
2332 `PRINT_OPERAND_ADDRESS'. */
2334 #ifdef REG_OK_STRICT
2335 #define REG_OK_STRICT_P 1
2337 #define REG_OK_STRICT_P 0
2340 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2342 if (d30v_legitimate_address_p ((int)MODE, X, REG_OK_STRICT_P)) \
2346 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
2347 use as a base register. For hard registers, it should always accept those
2348 which the hardware permits and reject the others. Whether the macro accepts
2349 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
2350 described above. This usually requires two variant definitions, of which
2351 `REG_OK_STRICT' controls the one actually used. */
2353 #ifdef REG_OK_STRICT
2354 #define REG_OK_FOR_BASE_P(X) (GPR_P (REGNO (X)))
2356 #define REG_OK_FOR_BASE_P(X) (GPR_OR_PSEUDO_P (REGNO (X)))
2359 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
2360 use as an index register.
2362 The difference between an index register and a base register is that the
2363 index register may be scaled. If an address involves the sum of two
2364 registers, neither one of them scaled, then either one may be labeled the
2365 "base" and the other the "index"; but whichever labeling is used must fit
2366 the machine's constraints of which registers may serve in each capacity.
2367 The compiler will try both labelings, looking for one that is valid, and
2368 will reload one or both registers only if neither labeling works. */
2370 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
2372 /* A C compound statement that attempts to replace X with a valid memory
2373 address for an operand of mode MODE. WIN will be a C statement label
2374 elsewhere in the code; the macro definition may use
2376 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
2378 to avoid further processing if the address has become legitimate.
2380 X will always be the result of a call to `break_out_memory_refs', and OLDX
2381 will be the operand that was given to that function to produce X.
2383 The code generated by this macro should not alter the substructure of X. If
2384 it transforms X into a more legitimate form, it should assign X (which will
2385 always be a C variable) a new value.
2387 It is not necessary for this macro to come up with a legitimate address.
2388 The compiler has standard ways of doing so in all cases. In fact, it is
2389 safe for this macro to do nothing. But often a machine-dependent strategy
2390 can generate better code. */
2392 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2394 rtx y = d30v_legitimize_address (X, OLDX, (int)MODE, REG_OK_STRICT_P); \
2398 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); \
2402 /* A C statement or compound statement with a conditional `goto LABEL;'
2403 executed if memory address X (an RTX) can have different meanings depending
2404 on the machine mode of the memory reference it is used for or if the address
2405 is valid for some modes but not others.
2407 Autoincrement and autodecrement addresses typically have mode-dependent
2408 effects because the amount of the increment or decrement is the size of the
2409 operand being addressed. Some machines have other mode-dependent addresses.
2410 Many RISC machines have no mode-dependent addresses.
2412 You may assume that ADDR is a valid address for the machine. */
2414 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2416 if (d30v_mode_dependent_address_p (ADDR)) \
2420 /* A C expression that is nonzero if X is a legitimate constant for an
2421 immediate operand on the target machine. You can assume that X satisfies
2422 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
2423 definition for this macro on machines where anything `CONSTANT_P' is valid. */
2424 #define LEGITIMATE_CONSTANT_P(X) 1
2427 /* Condition Code Status */
2429 /* C code for a data type which is used for declaring the `mdep' component of
2430 `cc_status'. It defaults to `int'.
2432 This macro is not used on machines that do not use `cc0'. */
2433 /* #define CC_STATUS_MDEP */
2435 /* A C expression to initialize the `mdep' field to "empty". The default
2436 definition does nothing, since most machines don't use the field anyway. If
2437 you want to use the field, you should probably define this macro to
2440 This macro is not used on machines that do not use `cc0'. */
2441 /* #define CC_STATUS_MDEP_INIT */
2443 /* A C compound statement to set the components of `cc_status' appropriately
2444 for an insn INSN whose body is EXP. It is this macro's responsibility to
2445 recognize insns that set the condition code as a byproduct of other activity
2446 as well as those that explicitly set `(cc0)'.
2448 This macro is not used on machines that do not use `cc0'.
2450 If there are insns that do not set the condition code but do alter other
2451 machine registers, this macro must check to see whether they invalidate the
2452 expressions that the condition code is recorded as reflecting. For example,
2453 on the 68000, insns that store in address registers do not set the condition
2454 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
2455 unaltered for such insns. But suppose that the previous insn set the
2456 condition code based on location `a4@(102)' and the current insn stores a
2457 new value in `a4'. Although the condition code is not changed by this, it
2458 will no longer be true that it reflects the contents of `a4@(102)'.
2459 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
2460 that nothing is known about the condition code value.
2462 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
2463 results of peephole optimization: insns whose patterns are `parallel' RTXs
2464 containing various `reg', `mem' or constants which are just the operands.
2465 The RTL structure of these insns is not sufficient to indicate what the
2466 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
2467 just to run `CC_STATUS_INIT'.
2469 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
2470 at an attribute (*note Insn Attributes::.) named, for example, `cc'. This
2471 avoids having detailed information about patterns in two places, the `md'
2472 file and in `NOTICE_UPDATE_CC'. */
2473 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
2475 /* A list of names to be used for additional modes for condition code values in
2476 registers (*note Jump Patterns::.). These names are added to `enum
2477 machine_mode' and all have class `MODE_CC'. By convention, they should
2478 start with `CC' and end with `mode'.
2480 You should only define this macro if your machine does not use `cc0' and
2481 only if additional modes are required. */
2482 /* #define EXTRA_CC_MODES */
2484 /* Returns a mode from class `MODE_CC' to be used when comparison operation
2485 code OP is applied to rtx X and Y. For example, on the Sparc,
2486 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
2487 description of the reason for this definition)
2489 #define SELECT_CC_MODE(OP,X,Y) \
2490 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
2491 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
2492 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
2493 || GET_CODE (X) == NEG) \
2494 ? CC_NOOVmode : CCmode))
2496 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
2497 /* #define SELECT_CC_MODE(OP, X, Y) */
2499 /* One some machines not all possible comparisons are defined, but you can
2500 convert an invalid comparison into a valid one. For example, the Alpha does
2501 not have a `GT' comparison, but you can use an `LT' comparison instead and
2502 swap the order of the operands.
2504 On such machines, define this macro to be a C statement to do any required
2505 conversions. CODE is the initial comparison code and OP0 and OP1 are the
2506 left and right operands of the comparison, respectively. You should modify
2507 CODE, OP0, and OP1 as required.
2509 GNU CC will not assume that the comparison resulting from this macro is
2510 valid but will see if the resulting insn matches a pattern in the `md' file.
2512 You need not define this macro if it would never change the comparison code
2514 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
2516 /* A C expression whose value is one if it is always safe to reverse a
2517 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
2518 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
2521 You need not define this macro if it would always returns zero or if the
2522 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
2523 example, here is the definition used on the Sparc, where floating-point
2524 inequality comparisons are always given `CCFPEmode':
2526 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
2527 /* #define REVERSIBLE_CC_MODE(MODE) */
2530 /* Describing Relative Costs of Operations */
2532 /* A part of a C `switch' statement that describes the relative costs of
2533 constant RTL expressions. It must contain `case' labels for expression
2534 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
2535 Each case must ultimately reach a `return' statement to return the relative
2536 cost of the use of that kind of constant value in an expression. The cost
2537 may depend on the precise value of the constant, which is available for
2538 examination in X, and the rtx code of the expression in which it is
2539 contained, found in OUTER_CODE.
2541 CODE is the expression code--redundant, since it can be obtained with
2544 /* On the d30v, consider operatnds that fit in a short instruction very
2545 cheap. However, at this time, it causes cse to generate incorrect
2546 code, so disable it for now. */
2548 #define CONST_COSTS(X, CODE, OUTER_CODE) \
2550 if (IN_RANGE_P (INTVAL (X), 0, 31)) \
2552 else if ((OUTER_CODE) == LEU && (OUTER_CODE) == LTU \
2553 && (OUTER_CODE) == GEU && (OUTER_CODE) == GTU) \
2554 return IN_RANGE_P (INTVAL (X), 32, 63) ? 0 : COSTS_N_INSNS (2); \
2556 return IN_RANGE_P (INTVAL (X), -31, -1) ? 0 : COSTS_N_INSNS (2); \
2560 return COSTS_N_INSNS (2); \
2561 case CONST_DOUBLE: \
2562 return COSTS_N_INSNS ((GET_MODE (X) == SFmode) ? 2 : 4);
2564 #define CONST_COSTS(X, CODE, OUTER_CODE)
2567 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
2568 used, for example, to indicate how costly a multiply instruction is. In
2569 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
2570 a cost equal to N fast instructions. OUTER_CODE is the code of the
2571 expression in which X is contained.
2573 This macro is optional; do not define it if the default cost assumptions are
2574 adequate for the target machine. */
2575 #define RTX_COSTS(X, CODE, OUTER_CODE) \
2577 return COSTS_N_INSNS ((GET_CODE (XEXP (x, 1)) == CONST_INT \
2578 && exact_log2 (INTVAL (XEXP (x, 1))) >= 0) \
2581 /* An expression giving the cost of an addressing mode that contains ADDRESS.
2582 If not defined, the cost is computed from the ADDRESS expression and the
2583 `CONST_COSTS' values.
2585 For most CISC machines, the default cost is a good approximation of the true
2586 cost of the addressing mode. However, on RISC machines, all instructions
2587 normally have the same length and execution time. Hence all addresses will
2590 In cases where more than one form of an address is known, the form with the
2591 lowest cost will be used. If multiple forms have the same, lowest, cost,
2592 the one that is the most complex will be used.
2594 For example, suppose an address that is equal to the sum of a register and a
2595 constant is used twice in the same basic block. When this macro is not
2596 defined, the address will be computed in a register and memory references
2597 will be indirect through that register. On machines where the cost of the
2598 addressing mode containing the sum is no higher than that of a simple
2599 indirect reference, this will produce an additional instruction and possibly
2600 require an additional register. Proper specification of this macro
2601 eliminates this overhead for such machines.
2603 Similar use of this macro is made in strength reduction of loops.
2605 ADDRESS need not be valid as an address. In such a case, the cost is not
2606 relevant and can be any value; invalid addresses need not be assigned a
2609 On machines where an address involving more than one register is as cheap as
2610 an address computation involving only one register, defining `ADDRESS_COST'
2611 to reflect this can cause two registers to be live over a region of code
2612 where only one would have been if `ADDRESS_COST' were not defined in that
2613 manner. This effect should be considered in the definition of this macro.
2614 Equivalent costs should probably only be given to addresses with different
2615 numbers of registers on machines with lots of registers.
2617 This macro will normally either not be defined or be defined as a constant. */
2618 #define ADDRESS_COST(ADDRESS) 0
2620 /* A C expression for the cost of moving data from a register in class FROM to
2621 one in class TO. The classes are expressed using the enumeration values
2622 such as `GENERAL_REGS'. A value of 4 is the default; other values are
2623 interpreted relative to that.
2625 It is not required that the cost always equal 2 when FROM is the same as TO;
2626 on some machines it is expensive to move between registers if they are not
2629 If reload sees an insn consisting of a single `set' between two hard
2630 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
2631 value of 2, reload does not check to ensure that the constraints of the insn
2632 are met. Setting a cost of other than 2 will allow reload to verify that
2633 the constraints are met. You should do this if the `movM' pattern's
2634 constraints do not allow such copying. */
2636 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
2637 (((FROM) != GPR_REGS && (FROM) != EVEN_REGS \
2638 && (TO) != GPR_REGS && (TO) != EVEN_REGS) ? 4 : 2)
2640 /* A C expression for the cost of moving data of mode M between a register and
2641 memory. A value of 2 is the default; this cost is relative to those in
2642 `REGISTER_MOVE_COST'.
2644 If moving between registers and memory is more expensive than between two
2645 registers, you should define this macro to express the relative cost. */
2646 #define MEMORY_MOVE_COST(M,C,I) 4
2648 /* A C expression for the cost of a branch instruction. A value of 1 is the
2649 default; other values are interpreted relative to that. */
2651 #define BRANCH_COST d30v_branch_cost
2653 #define D30V_DEFAULT_BRANCH_COST 2
2655 /* Values of the -mbranch-cost=n string. */
2656 extern int d30v_branch_cost;
2657 extern const char *d30v_branch_cost_string;
2659 /* Here are additional macros which do not specify precise relative costs, but
2660 only that certain actions are more expensive than GNU CC would ordinarily
2663 /* Define this macro as a C expression which is nonzero if accessing less than
2664 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
2665 word of memory, i.e., if such access require more than one instruction or if
2666 there is no difference in cost between byte and (aligned) word loads.
2668 When this macro is not defined, the compiler will access a field by finding
2669 the smallest containing object; when it is defined, a fullword load will be
2670 used if alignment permits. Unless bytes accesses are faster than word
2671 accesses, using word accesses is preferable since it may eliminate
2672 subsequent memory access if subsequent accesses occur to other fields in the
2673 same word of the structure, but to different bytes. */
2674 #define SLOW_BYTE_ACCESS 1
2676 /* Define this macro to be the value 1 if unaligned accesses have a cost many
2677 times greater than aligned accesses, for example if they are emulated in a
2680 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
2681 were non-zero when generating code for block moves. This can cause
2682 significantly more instructions to be produced. Therefore, do not set this
2683 macro non-zero if unaligned accesses only add a cycle or two to the time for
2686 If the value of this macro is always zero, it need not be defined. */
2687 /* #define SLOW_UNALIGNED_ACCESS */
2689 /* Define this macro to inhibit strength reduction of memory addresses. (On
2690 some machines, such strength reduction seems to do harm rather than good.) */
2691 /* #define DONT_REDUCE_ADDR */
2693 /* The number of scalar move insns which should be generated instead of a
2694 string move insn or a library call. Increasing the value will always make
2695 code faster, but eventually incurs high cost in increased code size.
2697 If you don't define this, a reasonable default is used. */
2698 /* #define MOVE_RATIO */
2700 /* Define this macro if it is as good or better to call a constant function
2701 address than to call an address kept in a register. */
2702 #define NO_FUNCTION_CSE
2704 /* Define this macro if it is as good or better for a function to call itself
2705 with an explicit address than to call an address kept in a register. */
2706 /* #define NO_RECURSIVE_FUNCTION_CSE */
2709 /* Dividing the output into sections. */
2711 /* A C expression whose value is a string containing the assembler operation
2712 that should precede instructions and read-only data. Normally `".text"' is
2714 #define TEXT_SECTION_ASM_OP "\t.text"
2716 /* A C expression whose value is a string containing the assembler operation to
2717 identify the following data as writable initialized data. Normally
2718 `".data"' is right. */
2719 #define DATA_SECTION_ASM_OP "\t.data"
2721 /* if defined, a C expression whose value is a string containing the assembler
2722 operation to identify the following data as shared data. If not defined,
2723 `DATA_SECTION_ASM_OP' will be used. */
2724 /* #define SHARED_SECTION_ASM_OP */
2726 /* If defined, a C expression whose value is a string containing the
2727 assembler operation to identify the following data as
2728 uninitialized global data. If not defined, and neither
2729 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
2730 uninitialized global data will be output in the data section if
2731 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
2733 #define BSS_SECTION_ASM_OP "\t.bss"
2735 /* If defined, a C expression whose value is a string containing the
2736 assembler operation to identify the following data as
2737 uninitialized global shared data. If not defined, and
2738 `BSS_SECTION_ASM_OP' is, the latter will be used. */
2739 /* #define SHARED_BSS_SECTION_ASM_OP */
2741 /* A list of names for sections other than the standard two, which are
2742 `in_text' and `in_data'. You need not define this macro on a system with no
2743 other sections (that GCC needs to use).
2745 Defined in svr4.h. */
2746 /* #define EXTRA_SECTIONS */
2748 /* One or more functions to be defined in `varasm.c'. These functions should
2749 do jobs analogous to those of `text_section' and `data_section', for your
2750 additional sections. Do not define this macro if you do not define
2753 Defined in svr4.h. */
2754 /* #define EXTRA_SECTION_FUNCTIONS */
2756 /* On most machines, read-only variables, constants, and jump tables are placed
2757 in the text section. If this is not the case on your machine, this macro
2758 should be defined to be the name of a function (either `data_section' or a
2759 function defined in `EXTRA_SECTIONS') that switches to the section to be
2760 used for read-only items.
2762 If these items should be placed in the text section, this macro should not
2764 /* #define READONLY_DATA_SECTION */
2766 /* A C statement or statements to switch to the appropriate section for output
2767 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
2768 of some sort. RELOC indicates whether the initial value of EXP requires
2769 link-time relocations. Select the section by calling `text_section' or one
2770 of the alternatives for other sections.
2772 Do not define this macro if you put all read-only variables and constants in
2773 the read-only data section (usually the text section).
2775 Defined in svr4.h. */
2776 /* #define SELECT_SECTION(EXP, RELOC, ALIGN) */
2778 /* A C statement or statements to switch to the appropriate section for output
2779 of RTX in mode MODE. You can assume that RTX is some kind of constant in
2780 RTL. The argument MODE is redundant except in the case of a `const_int'
2781 rtx. Select the section by calling `text_section' or one of the
2782 alternatives for other sections.
2784 Do not define this macro if you put all constants in the read-only data
2787 Defined in svr4.h. */
2788 /* #define SELECT_RTX_SECTION(MODE, RTX, ALIGN) */
2790 /* Define this macro if jump tables (for `tablejump' insns) should be output in
2791 the text section, along with the assembler instructions. Otherwise, the
2792 readonly data section is used.
2794 This macro is irrelevant if there is no separate readonly data section. */
2795 /* #define JUMP_TABLES_IN_TEXT_SECTION */
2797 /* Define this macro if references to a symbol must be treated differently
2798 depending on something about the variable or function named by the symbol
2799 (such as what section it is in).
2801 The macro definition, if any, is executed immediately after the rtl for DECL
2802 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
2803 be a `mem' whose address is a `symbol_ref'.
2805 The usual thing for this macro to do is to record a flag in the `symbol_ref'
2806 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
2807 `symbol_ref' (if one bit is not enough information). */
2808 /* #define ENCODE_SECTION_INFO(DECL) */
2810 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
2811 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
2812 the symbol's name string. */
2813 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
2815 /* A C statement to build up a unique section name, expressed as a
2816 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
2817 RELOC indicates whether the initial value of EXP requires
2818 link-time relocations. If you do not define this macro, GNU CC
2819 will use the symbol name prefixed by `.' as the section name.
2821 Defined in svr4.h. */
2822 /* #define UNIQUE_SECTION(DECL, RELOC) */
2825 /* Position Independent Code. */
2827 /* The register number of the register used to address a table of static data
2828 addresses in memory. In some cases this register is defined by a
2829 processor's "application binary interface" (ABI). When this macro is
2830 defined, RTL is generated for this register once, as with the stack pointer
2831 and frame pointer registers. If this macro is not defined, it is up to the
2832 machine-dependent files to allocate such a register (if necessary). */
2833 /* #define PIC_OFFSET_TABLE_REGNUM */
2835 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
2836 clobbered by calls. Do not define this macro if `PIC_OFFSET_TABLE_REGNUM'
2838 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
2840 /* By generating position-independent code, when two different programs (A and
2841 B) share a common library (libC.a), the text of the library can be shared
2842 whether or not the library is linked at the same address for both programs.
2843 In some of these environments, position-independent code requires not only
2844 the use of different addressing modes, but also special code to enable the
2845 use of these addressing modes.
2847 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
2848 the function is being compiled into assembly code, but not before. (It is
2849 not done before, because in the case of compiling an inline function, it
2850 would lead to multiple PIC prologues being included in functions which used
2851 inline functions and were compiled to assembly language.) */
2852 /* #define FINALIZE_PIC */
2854 /* A C expression that is nonzero if X is a legitimate immediate operand on the
2855 target machine when generating position independent code. You can assume
2856 that X satisfies `CONSTANT_P', so you need not check this. You can also
2857 assume FLAG_PIC is true, so you need not check it either. You need not
2858 define this macro if all constants (including `SYMBOL_REF') can be immediate
2859 operands when generating position independent code. */
2860 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
2863 /* The Overall Framework of an Assembler File. */
2865 /* A C expression which outputs to the stdio stream STREAM some appropriate
2866 text to go at the start of an assembler file.
2868 Normally this macro is defined to output a line containing `#NO_APP', which
2869 is a comment that has no effect on most assemblers but tells the GNU
2870 assembler that it can save time by not checking for certain assembler
2873 On systems that use SDB, it is necessary to output certain commands; see
2876 Defined in svr4.h. */
2878 /* #define ASM_FILE_START(STREAM) \
2879 output_file_directive ((STREAM), main_input_filename) */
2881 /* A C expression which outputs to the stdio stream STREAM some appropriate
2882 text to go at the end of an assembler file.
2884 If this macro is not defined, the default is to output nothing special at
2885 the end of the file. Most systems don't require any definition.
2887 On systems that use SDB, it is necessary to output certain commands; see
2890 Defined in svr4.h. */
2891 /* #define ASM_FILE_END(STREAM) */
2893 /* A C string constant describing how to begin a comment in the target
2894 assembler language. The compiler assumes that the comment will end at the
2896 #define ASM_COMMENT_START ";"
2898 /* A C string constant for text to be output before each `asm' statement or
2899 group of consecutive ones. Normally this is `"#APP"', which is a comment
2900 that has no effect on most assemblers but tells the GNU assembler that it
2901 must check the lines that follow for all valid assembler constructs. */
2902 #define ASM_APP_ON "#APP\n"
2904 /* A C string constant for text to be output after each `asm' statement or
2905 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
2906 GNU assembler to resume making the time-saving assumptions that are valid
2907 for ordinary compiler output. */
2908 #define ASM_APP_OFF "#NO_APP\n"
2910 /* A C statement to output COFF information or DWARF debugging information
2911 which indicates that filename NAME is the current source file to the stdio
2914 This macro need not be defined if the standard form of output for the file
2915 format in use is appropriate. */
2916 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
2918 /* A C statement to output DBX or SDB debugging information before code for
2919 line number LINE of the current source file to the stdio stream STREAM.
2921 This macro need not be defined if the standard form of debugging information
2922 for the debugger in use is appropriate.
2924 Defined in svr4.h. */
2925 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
2927 /* A C statement to output something to the assembler file to handle a `#ident'
2928 directive containing the text STRING. If this macro is not defined, nothing
2929 is output for a `#ident' directive.
2931 Defined in svr4.h. */
2932 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
2934 /* A C statement to output any assembler statements which are required to
2935 precede any Objective C object definitions or message sending. The
2936 statement is executed only when compiling an Objective C program. */
2937 /* #define OBJC_PROLOGUE */
2940 /* Output of Data. */
2942 /* A C statement to output to the stdio stream STREAM an assembler instruction
2943 to assemble a string constant containing the LEN bytes at PTR. PTR will be
2944 a C expression of type `char *' and LEN a C expression of type `int'.
2946 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
2947 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
2949 Defined in svr4.h. */
2950 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
2952 /* You may define this macro as a C expression. You should define the
2953 expression to have a non-zero value if GNU CC should output the
2954 constant pool for a function before the code for the function, or
2955 a zero value if GNU CC should output the constant pool after the
2956 function. If you do not define this macro, the usual case, GNU CC
2957 will output the constant pool before the function. */
2958 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
2960 /* A C statement to output assembler commands to define the start of the
2961 constant pool for a function. FUNNAME is a string giving the name of the
2962 function. Should the return type of the function be required, it can be
2963 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
2964 will be written immediately after this call.
2966 If no constant-pool prefix is required, the usual case, this macro need not
2968 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
2970 /* A C statement (with or without semicolon) to output a constant in the
2971 constant pool, if it needs special treatment. (This macro need not do
2972 anything for RTL expressions that can be output normally.)
2974 The argument FILE is the standard I/O stream to output the assembler code
2975 on. X is the RTL expression for the constant to output, and MODE is the
2976 machine mode (in case X is a `const_int'). ALIGN is the required alignment
2977 for the value X; you should output an assembler directive to force this much
2980 The argument LABELNO is a number to use in an internal label for the address
2981 of this pool entry. The definition of this macro is responsible for
2982 outputting the label definition at the proper place. Here is how to do
2985 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
2987 When you output a pool entry specially, you should end with a `goto' to the
2988 label JUMPTO. This will prevent the same pool entry from being output a
2989 second time in the usual manner.
2991 You need not define this macro if it would do nothing. */
2992 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
2994 /* Define this macro as a C expression which is nonzero if the constant EXP, of
2995 type `tree', should be output after the code for a function. The compiler
2996 will normally output all constants before the function; you need not define
2997 this macro if this is OK. */
2998 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
3000 /* A C statement to output assembler commands to at the end of the constant
3001 pool for a function. FUNNAME is a string giving the name of the function.
3002 Should the return type of the function be required, you can obtain it via
3003 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
3004 immediately before this call.
3006 If no constant-pool epilogue is required, the usual case, you need not
3007 define this macro. */
3008 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
3010 /* Define this macro as a C expression which is nonzero if C is used as a
3011 logical line separator by the assembler.
3013 If you do not define this macro, the default is that only the character `;'
3014 is treated as a logical line separator. */
3015 /* #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) */
3017 /* These macros are provided by `real.h' for writing the definitions of
3018 `ASM_OUTPUT_DOUBLE' and the like: */
3020 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
3021 representation, and store its bit pattern in the array of `long int' whose
3022 address is L. The number of elements in the output array is determined by
3023 the size of the desired target floating point data type: 32 bits of it go in
3024 each `long int' array element. Each array element holds 32 bits of the
3025 result, even if `long int' is wider than 32 bits on the host machine.
3027 The array element values are designed so that you can print them out using
3028 `fprintf' in the order they should appear in the target machine's memory. */
3029 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
3030 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
3031 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
3033 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
3034 stores it as a string into STRING. You must pass, as STRING, the address of
3035 a long enough block of space to hold the result.
3037 The argument FORMAT is a `printf'-specification that serves as a suggestion
3038 for how to format the output string. */
3039 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
3042 /* Output of Uninitialized Variables. */
3044 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3045 assembler definition of a common-label named NAME whose size is SIZE bytes.
3046 The variable ROUNDED is the size rounded up to whatever alignment the caller
3049 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3050 before and after that, output the additional assembler syntax for defining
3051 the name, and a newline.
3053 This macro controls how the assembler definitions of uninitialized global
3054 variables are output. */
3055 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3057 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
3058 explicit argument. If you define this macro, it is used in place of
3059 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
3060 alignment of the variable. The alignment is specified as the number of
3063 Defined in svr4.h. */
3064 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
3066 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
3067 the DECL of the variable to be output, if there is one. This macro can be
3068 called with DECL == NULL_TREE. If you define this macro, it is used in
3069 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
3070 more flexibility in handling the destination of the variable. */
3071 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3073 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
3074 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
3075 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3077 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3078 assembler definition of uninitialized global DECL named NAME whose size is
3079 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
3080 alignment the caller wants.
3082 Try to use function `asm_output_bss' defined in `varasm.c' when defining
3083 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
3084 output the name itself; before and after that, output the additional
3085 assembler syntax for defining the name, and a newline.
3087 This macro controls how the assembler definitions of uninitialized global
3088 variables are output. This macro exists to properly support languages like
3089 `c++' which do not have `common' data. However, this macro currently is not
3090 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
3091 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
3092 `ASM_OUTPUT_DECL_COMMON' is used. */
3093 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3095 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
3096 explicit argument. If you define this macro, it is used in place of
3097 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
3098 alignment of the variable. The alignment is specified as the number of
3101 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
3102 defining this macro. */
3103 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3105 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
3106 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
3107 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3109 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3110 assembler definition of a local-common-label named NAME whose size is SIZE
3111 bytes. The variable ROUNDED is the size rounded up to whatever alignment
3114 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3115 before and after that, output the additional assembler syntax for defining
3116 the name, and a newline.
3118 This macro controls how the assembler definitions of uninitialized static
3119 variables are output. */
3120 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
3122 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
3123 explicit argument. If you define this macro, it is used in place of
3124 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
3125 alignment of the variable. The alignment is specified as the number of
3128 Defined in svr4.h. */
3129 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
3131 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
3132 parameter - the DECL of variable to be output, if there is one.
3133 This macro can be called with DECL == NULL_TREE. If you define
3134 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
3135 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
3136 handling the destination of the variable. */
3137 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3139 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
3140 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
3141 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
3144 /* Output and Generation of Labels. */
3146 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3147 assembler definition of a label named NAME. Use the expression
3148 `assemble_name (STREAM, NAME)' to output the name itself; before and after
3149 that, output the additional assembler syntax for defining the name, and a
3152 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
3154 assemble_name (STREAM, NAME); \
3155 fputs (":\n", STREAM); \
3158 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3159 necessary for declaring the name NAME of a function which is being defined.
3160 This macro is responsible for outputting the label definition (perhaps using
3161 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
3162 representing the function.
3164 If this macro is not defined, then the function name is defined in the usual
3165 manner as a label (by means of `ASM_OUTPUT_LABEL').
3167 Defined in svr4.h. */
3168 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
3170 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3171 necessary for declaring the size of a function which is being defined. The
3172 argument NAME is the name of the function. The argument DECL is the
3173 `FUNCTION_DECL' tree node representing the function.
3175 If this macro is not defined, then the function size is not defined.
3177 Defined in svr4.h. */
3178 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
3180 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3181 necessary for declaring the name NAME of an initialized variable which is
3182 being defined. This macro must output the label definition (perhaps using
3183 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
3184 representing the variable.
3186 If this macro is not defined, then the variable name is defined in the usual
3187 manner as a label (by means of `ASM_OUTPUT_LABEL').
3189 Defined in svr4.h. */
3190 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
3192 /* A C statement (sans semicolon) to finish up declaring a variable name once
3193 the compiler has processed its initializer fully and thus has had a chance
3194 to determine the size of an array when controlled by an initializer. This
3195 is used on systems where it's necessary to declare something about the size
3198 If you don't define this macro, that is equivalent to defining it to do
3201 Defined in svr4.h. */
3202 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
3204 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
3205 commands that will make the label NAME global; that is, available for
3206 reference from other files. Use the expression `assemble_name (STREAM,
3207 NAME)' to output the name itself; before and after that, output the
3208 additional assembler syntax for making that name global, and a newline. */
3210 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
3212 fputs ("\t.globl ", STREAM); \
3213 assemble_name (STREAM, NAME); \
3214 fputs ("\n", STREAM); \
3217 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
3218 commands that will make the label NAME weak; that is, available for
3219 reference from other files but only used if no other definition is
3220 available. Use the expression `assemble_name (STREAM, NAME)' to output the
3221 name itself; before and after that, output the additional assembler syntax
3222 for making that name weak, and a newline.
3224 If you don't define this macro, GNU CC will not support weak symbols and you
3225 should not define the `SUPPORTS_WEAK' macro.
3227 Defined in svr4.h. */
3228 /* #define ASM_WEAKEN_LABEL */
3230 /* A C expression which evaluates to true if the target supports weak symbols.
3232 If you don't define this macro, `defaults.h' provides a default definition.
3233 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
3234 it is `0'. Define this macro if you want to control weak symbol support
3235 with a compiler flag such as `-melf'. */
3236 /* #define SUPPORTS_WEAK */
3238 /* A C statement (sans semicolon) to mark DECL to be emitted as a
3239 public symbol such that extra copies in multiple translation units
3240 will be discarded by the linker. Define this macro if your object
3241 file format provides support for this concept, such as the `COMDAT'
3242 section flags in the Microsoft Windows PE/COFF format, and this
3243 support requires changes to DECL, such as putting it in a separate
3246 Defined in svr4.h. */
3247 /* #define MAKE_DECL_ONE_ONLY */
3249 /* A C expression which evaluates to true if the target supports one-only
3252 If you don't define this macro, `varasm.c' provides a default definition.
3253 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
3254 otherwise, it is `0'. Define this macro if you want to control one-only
3255 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
3256 is enough to mark a declaration to be emitted as one-only. */
3257 /* #define SUPPORTS_ONE_ONLY */
3259 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3260 necessary for declaring the name of an external symbol named NAME which is
3261 referenced in this compilation but not defined. The value of DECL is the
3262 tree node for the declaration.
3264 This macro need not be defined if it does not need to output anything. The
3265 GNU assembler and most Unix assemblers don't require anything. */
3266 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
3268 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
3269 declare a library function name external. The name of the library function
3270 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
3272 This macro need not be defined if it does not need to output anything. The
3273 GNU assembler and most Unix assemblers don't require anything.
3275 Defined in svr4.h. */
3276 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
3278 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
3279 reference in assembler syntax to a label named NAME. This should add `_' to
3280 the front of the name, if that is customary on your operating system, as it
3281 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
3282 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
3284 /* A C statement to output to the stdio stream STREAM a label whose name is
3285 made from the string PREFIX and the number NUM.
3287 It is absolutely essential that these labels be distinct from the labels
3288 used for user-level functions and variables. Otherwise, certain programs
3289 will have name conflicts with internal labels.
3291 It is desirable to exclude internal labels from the symbol table of the
3292 object file. Most assemblers have a naming convention for labels that
3293 should be excluded; on many systems, the letter `L' at the beginning of a
3294 label has this effect. You should find out what convention your system
3295 uses, and follow it.
3297 The usual definition of this macro is as follows:
3299 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
3301 Defined in svr4.h. */
3302 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
3304 /* A C statement to store into the string STRING a label whose name is made
3305 from the string PREFIX and the number NUM.
3307 This string, when output subsequently by `assemble_name', should produce the
3308 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
3311 If the string begins with `*', then `assemble_name' will output the rest of
3312 the string unchanged. It is often convenient for
3313 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
3314 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
3315 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
3316 machine description, so you should know what it does on your machine.)
3318 Defined in svr4.h. */
3321 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
3323 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
3327 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
3328 newly allocated string made from the string NAME and the number NUMBER, with
3329 some suitable punctuation added. Use `alloca' to get space for the string.
3331 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
3332 an assembler label for an internal static variable whose name is NAME.
3333 Therefore, the string must be such as to result in valid assembler code.
3334 The argument NUMBER is different each time this macro is executed; it
3335 prevents conflicts between similarly-named internal static variables in
3338 Ideally this string should not be a valid C identifier, to prevent any
3339 conflict with the user's own symbols. Most assemblers allow periods or
3340 percent signs in assembler symbols; putting at least one of these between
3341 the name and the number will suffice. */
3343 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
3345 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
3346 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
3349 /* A C statement to output to the stdio stream STREAM assembler code which
3350 defines (equates) the symbol NAME to have the value VALUE.
3352 If SET_ASM_OP is defined, a default definition is provided which is correct
3355 Defined in svr4.h. */
3356 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
3358 /* A C statement to output to the stdio stream STREAM assembler code which
3359 defines (equates) the weak symbol NAME to have the value VALUE.
3361 Define this macro if the target only supports weak aliases; define
3362 ASM_OUTPUT_DEF instead if possible. */
3363 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
3365 /* Define this macro to override the default assembler names used for Objective
3368 The default name is a unique method number followed by the name of the class
3369 (e.g. `_1_Foo'). For methods in categories, the name of the category is
3370 also included in the assembler name (e.g. `_1_Foo_Bar').
3372 These names are safe on most systems, but make debugging difficult since the
3373 method's selector is not present in the name. Therefore, particular systems
3374 define other ways of computing names.
3376 BUF is an expression of type `char *' which gives you a buffer in which to
3377 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
3378 put together, plus 50 characters extra.
3380 The argument IS_INST specifies whether the method is an instance method or a
3381 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
3382 the category (or NULL if the method is not in a category); and SEL_NAME is
3383 the name of the selector.
3385 On systems where the assembler can handle quoted names, you can use this
3386 macro to provide more human-readable names. */
3387 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
3390 /* Macros Controlling Initialization Routines. */
3392 /* If defined, a C string constant for the assembler operation to identify the
3393 following data as initialization code. If not defined, GNU CC will assume
3394 such a section does not exist. When you are using special sections for
3395 initialization and termination functions, this macro also controls how
3396 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
3398 Defined in svr4.h. */
3399 /* #define INIT_SECTION_ASM_OP */
3400 #undef INIT_SECTION_ASM_OP
3402 /* If defined, `main' will not call `__main' as described above. This macro
3403 should be defined for systems that control the contents of the init section
3404 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
3405 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
3406 /* #define HAS_INIT_SECTION */
3408 /* If defined, a C string constant for a switch that tells the linker that the
3409 following symbol is an initialization routine. */
3410 /* #define LD_INIT_SWITCH */
3412 /* If defined, a C string constant for a switch that tells the linker that the
3413 following symbol is a finalization routine. */
3414 /* #define LD_FINI_SWITCH */
3416 /* If defined, `main' will call `__main' despite the presence of
3417 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
3418 init section is not actually run automatically, but is still useful for
3419 collecting the lists of constructors and destructors. */
3420 #define INVOKE__main
3422 /* If your system uses `collect2' as the means of processing constructors, then
3423 that program normally uses `nm' to scan an object file for constructor
3424 functions to be called. On certain kinds of systems, you can define these
3425 macros to make `collect2' work faster (and, in some cases, make it work at
3428 /* Define this macro if the system uses COFF (Common Object File Format) object
3429 files, so that `collect2' can assume this format and scan object files
3430 directly for dynamic constructor/destructor functions. */
3431 /* #define OBJECT_FORMAT_COFF */
3433 /* Define this macro if the system uses ROSE format object files, so that
3434 `collect2' can assume this format and scan object files directly for dynamic
3435 constructor/destructor functions.
3437 These macros are effective only in a native compiler; `collect2' as
3438 part of a cross compiler always uses `nm' for the target machine. */
3439 /* #define OBJECT_FORMAT_ROSE */
3441 /* Define this macro if the system uses ELF format object files.
3443 Defined in svr4.h. */
3444 /* #define OBJECT_FORMAT_ELF */
3446 /* Define this macro as a C string constant containing the file name to use to
3447 execute `nm'. The default is to search the path normally for `nm'.
3449 If your system supports shared libraries and has a program to list the
3450 dynamic dependencies of a given library or executable, you can define these
3451 macros to enable support for running initialization and termination
3452 functions in shared libraries: */
3453 /* #define REAL_NM_FILE_NAME */
3455 /* Define this macro to a C string constant containing the name of the program
3456 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
3457 /* #define LDD_SUFFIX */
3459 /* Define this macro to be C code that extracts filenames from the output of
3460 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
3461 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
3462 line lists a dynamic dependency, the code must advance PTR to the beginning
3463 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
3464 /* #define PARSE_LDD_OUTPUT (PTR) */
3467 /* Output of Assembler Instructions. */
3469 /* A C initializer containing the assembler's names for the machine registers,
3470 each one as a C string constant. This is what translates register numbers
3471 in the compiler into assembler language. */
3472 #define REGISTER_NAMES \
3474 "r0", "r1", "r2", "r3", \
3475 "r4", "r5", "r6", "r7", \
3476 "r8", "r9", "r10", "r11", \
3477 "r12", "r13", "r14", "r15", \
3478 "r16", "r17", "r18", "r19", \
3479 "r20", "r21", "r22", "r23", \
3480 "r24", "r25", "r26", "r27", \
3481 "r28", "r29", "r30", "r31", \
3482 "r32", "r33", "r34", "r35", \
3483 "r36", "r37", "r38", "r39", \
3484 "r40", "r41", "r42", "r43", \
3485 "r44", "r45", "r46", "r47", \
3486 "r48", "r49", "r50", "r51", \
3487 "r52", "r53", "r54", "r55", \
3488 "r56", "r57", "r58", "r59", \
3489 "r60", "r61", "link", "sp", \
3491 "f0", "f1", "f2", "f3", \
3492 "s", "v", "va", "c", \
3494 "psw", "bpsw", "pc", "bpc", \
3495 "dpsw", "dpc", "rpt_c", "rpt_s", \
3496 "rpt_e", "mod_s", "mod_e", "iba", \
3497 "eit_vb", "int_s", "int_m", \
3500 /* If defined, a C initializer for an array of structures containing a name and
3501 a register number. This macro defines additional names for hard registers,
3502 thus allowing the `asm' option in declarations to refer to registers using
3504 #define ADDITIONAL_REGISTER_NAMES \
3506 {"r62", GPR_LINK}, \
3509 {"f5", FLAG_OVERFLOW}, \
3510 {"f6", FLAG_ACC_OVER}, \
3511 {"f7", FLAG_CARRY}, \
3512 {"carry", FLAG_CARRY}, \
3513 {"borrow", FLAG_BORROW}, \
3514 {"b", FLAG_BORROW}, \
3521 {"cr7", CR_RPT_C}, \
3522 {"cr8", CR_RPT_S}, \
3523 {"cr9", CR_RPT_E}, \
3524 {"cr10", CR_MOD_S}, \
3525 {"cr11", CR_MOD_E}, \
3527 {"cr15", CR_EIT_VB}, \
3528 {"cr16", CR_INT_S}, \
3529 {"cr17", CR_INT_M} \
3532 /* Define this macro if you are using an unusual assembler that requires
3533 different names for the machine instructions.
3535 The definition is a C statement or statements which output an assembler
3536 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
3537 variable of type `char *' which points to the opcode name in its "internal"
3538 form--the form that is written in the machine description. The definition
3539 should output the opcode name to STREAM, performing any translation you
3540 desire, and increment the variable PTR to point at the end of the opcode so
3541 that it will not be output twice.
3543 In fact, your macro definition may process less than the entire opcode name,
3544 or more than the opcode name; but if you want to process text that includes
3545 `%'-sequences to substitute operands, you must take care of the substitution
3546 yourself. Just be sure to increment PTR over whatever text should not be
3549 If you need to look at the operand values, they can be found as the elements
3550 of `recog_data.operand'.
3552 If the macro definition does nothing, the instruction is output in the usual
3554 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
3556 /* If defined, a C statement to be executed just prior to the output of
3557 assembler code for INSN, to modify the extracted operands so they will be
3560 Here the argument OPVEC is the vector containing the operands extracted from
3561 INSN, and NOPERANDS is the number of elements of the vector which contain
3562 meaningful data for this insn. The contents of this vector are what will be
3563 used to convert the insn template into assembler code, so you can change the
3564 assembler output by changing the contents of the vector.
3566 This macro is useful when various assembler syntaxes share a single file of
3567 instruction patterns; by defining this macro differently, you can cause a
3568 large class of instructions to be output differently (such as with
3569 rearranged operands). Naturally, variations in assembler syntax affecting
3570 individual insn patterns ought to be handled by writing conditional output
3571 routines in those patterns.
3573 If this macro is not defined, it is equivalent to a null statement. */
3574 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
3576 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
3577 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
3578 NOPERANDS will be zero. */
3579 /* #define FINAL_PRESCAN_LABEL */
3581 /* A C compound statement to output to stdio stream STREAM the assembler syntax
3582 for an instruction operand X. X is an RTL expression.
3584 CODE is a value that can be used to specify one of several ways of printing
3585 the operand. It is used when identical operands must be printed differently
3586 depending on the context. CODE comes from the `%' specification that was
3587 used to request printing of the operand. If the specification was just
3588 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
3589 the ASCII code for LTR.
3591 If X is a register, this macro should print the register's name. The names
3592 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
3593 is initialized from `REGISTER_NAMES'.
3595 When the machine description has a specification `%PUNCT' (a `%' followed by
3596 a punctuation character), this macro is called with a null pointer for X and
3597 the punctuation character for CODE.
3599 Standard operand flags that are handled elsewhere:
3600 `=' Output a number unique to each instruction in the compilation.
3601 `a' Substitute an operand as if it were a memory reference.
3602 `c' Omit the syntax that indicates an immediate operand.
3603 `l' Substitute a LABEL_REF into a jump instruction.
3604 `n' Like %cDIGIT, except negate the value before printing.
3606 The d30v specific operand flags are:
3608 `f' Print a SF constant as an int.
3609 `s' Subtract 32 and negate.
3610 `A' Print accumulator number without an `a' in front of it.
3611 `B' Print bit offset for BSET, etc. instructions.
3612 `E' Print u if this is zero extend, nothing if this is sign extend.
3613 `F' Emit /{f,t,x}{f,t,x} for executing a false condition.
3614 `L' Print the lower half of a 64 bit item.
3615 `M' Print a memory reference for ld/st instructions.
3616 `R' Return appropriate cmp instruction for relational test.
3618 `T' Emit /{f,t,x}{f,t,x} for executing a true condition.
3619 `U' Print the upper half of a 64 bit item. */
3621 #define PRINT_OPERAND(STREAM, X, CODE) d30v_print_operand (STREAM, X, CODE)
3623 /* A C expression which evaluates to true if CODE is a valid punctuation
3624 character for use in the `PRINT_OPERAND' macro. If
3625 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
3626 characters (except for the standard one, `%') are used in this way. */
3628 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.' || (CODE) == ':')
3630 /* A C compound statement to output to stdio stream STREAM the assembler syntax
3631 for an instruction operand that is a memory reference whose address is X. X
3632 is an RTL expression.
3634 On some machines, the syntax for a symbolic address depends on the section
3635 that the address refers to. On these machines, define the macro
3636 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3637 then check for it here. *Note Assembler Format::. */
3639 #define PRINT_OPERAND_ADDRESS(STREAM, X) d30v_print_operand_address (STREAM, X)
3641 /* A C statement, to be executed after all slot-filler instructions have been
3642 output. If necessary, call `dbr_sequence_length' to determine the number of
3643 slots filled in a sequence (zero if not currently outputting a sequence), to
3644 decide how many no-ops to output, or whatever.
3646 Don't define this macro if it has nothing to do, but it is helpful in
3647 reading assembly output if the extent of the delay sequence is made explicit
3648 (e.g. with white space).
3650 Note that output routines for instructions with delay slots must be prepared
3651 to deal with not being output as part of a sequence (i.e. when the
3652 scheduling pass is not run, or when no slot fillers could be found.) The
3653 variable `final_sequence' is null when not processing a sequence, otherwise
3654 it contains the `sequence' rtx being output. */
3655 /* #define DBR_OUTPUT_SEQEND(FILE) */
3657 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
3658 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
3659 single `md' file must support multiple assembler formats. In that case, the
3660 various `tm.h' files can define these macros differently.
3662 USER_LABEL_PREFIX is defined in svr4.h. */
3664 #define REGISTER_PREFIX "%"
3665 #define LOCAL_LABEL_PREFIX "."
3666 #define USER_LABEL_PREFIX ""
3667 #define IMMEDIATE_PREFIX ""
3669 /* If your target supports multiple dialects of assembler language (such as
3670 different opcodes), define this macro as a C expression that gives the
3671 numeric index of the assembler language dialect to use, with zero as the
3674 If this macro is defined, you may use `{option0|option1|option2...}'
3675 constructs in the output templates of patterns (*note Output Template::.) or
3676 in the first argument of `asm_fprintf'. This construct outputs `option0',
3677 `option1' or `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero,
3678 one or two, etc. Any special characters within these strings retain their
3681 If you do not define this macro, the characters `{', `|' and `}' do not have
3682 any special meaning when used in templates or operands to `asm_fprintf'.
3684 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
3685 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
3686 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
3687 and use the `{option0|option1}' syntax if the syntax variant are larger and
3688 involve such things as different opcodes or operand order. */
3689 /* #define ASSEMBLER_DIALECT */
3691 /* A C expression to output to STREAM some assembler code which will push hard
3692 register number REGNO onto the stack. The code need not be optimal, since
3693 this macro is used only when profiling. */
3694 /* #define ASM_OUTPUT_REG_PUSH (STREAM, REGNO) */
3696 /* A C expression to output to STREAM some assembler code which will pop hard
3697 register number REGNO off of the stack. The code need not be optimal, since
3698 this macro is used only when profiling. */
3699 /* #define ASM_OUTPUT_REG_POP (STREAM, REGNO) */
3702 /* Output of dispatch tables. */
3704 /* This macro should be provided on machines where the addresses in a dispatch
3705 table are relative to the table's own address.
3707 The definition should be a C statement to output to the stdio stream STREAM
3708 an assembler pseudo-instruction to generate a difference between two labels.
3709 VALUE and REL are the numbers of two internal labels. The definitions of
3710 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
3711 printed in the same way here. For example,
3713 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
3715 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
3716 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
3718 /* This macro should be provided on machines where the addresses in a dispatch
3721 The definition should be a C statement to output to the stdio stream STREAM
3722 an assembler pseudo-instruction to generate a reference to a label. VALUE
3723 is the number of an internal label whose definition is output using
3724 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
3726 fprintf (STREAM, "\t.word L%d\n", VALUE) */
3728 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
3729 fprintf (STREAM, "\t.word .L%d\n", VALUE)
3731 /* Define this if the label before a jump-table needs to be output specially.
3732 The first three arguments are the same as for `ASM_OUTPUT_INTERNAL_LABEL';
3733 the fourth argument is the jump-table which follows (a `jump_insn'
3734 containing an `addr_vec' or `addr_diff_vec').
3736 This feature is used on system V to output a `swbeg' statement for the
3739 If this macro is not defined, these labels are output with
3740 `ASM_OUTPUT_INTERNAL_LABEL'.
3742 Defined in svr4.h. */
3743 /* #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) */
3745 /* Define this if something special must be output at the end of a jump-table.
3746 The definition should be a C statement to be executed after the assembler
3747 code for the table is written. It should write the appropriate code to
3748 stdio stream STREAM. The argument TABLE is the jump-table insn, and NUM is
3749 the label-number of the preceding label.
3751 If this macro is not defined, nothing special is output at the end of the
3753 /* #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) */
3756 /* Assembler Commands for Exception Regions. */
3758 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
3759 does not contain any extraneous set bits in it. */
3760 /* #define MASK_RETURN_ADDR */
3762 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
3763 information, but it does not yet work with exception handling. Otherwise,
3764 if your target supports this information (if it defines
3765 `INCOMING_RETURN_ADDR_RTX'), GCC will provide a default definition of 1.
3767 If this macro is defined to 1, the DWARF 2 unwinder will be the default
3768 exception handling mechanism; otherwise, setjmp/longjmp will be used by
3771 If this macro is defined to anything, the DWARF 2 unwinder will be used
3772 instead of inline unwinders and __unwind_function in the non-setjmp case. */
3773 /* #define DWARF2_UNWIND_INFO */
3776 /* Assembler Commands for Alignment. */
3778 /* The alignment (log base 2) to put in front of LABEL, which follows
3781 This macro need not be defined if you don't want any special alignment to be
3782 done at such a time. Most machine descriptions do not currently define the
3784 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
3786 /* The desired alignment for the location counter at the beginning
3789 This macro need not be defined if you don't want any special alignment to be
3790 done at such a time. Most machine descriptions do not currently define the
3792 /* #define LOOP_ALIGN(LABEL) */
3794 /* A C statement to output to the stdio stream STREAM an assembler instruction
3795 to advance the location counter by NBYTES bytes. Those bytes should be zero
3796 when loaded. NBYTES will be a C expression of type `int'.
3798 Defined in svr4.h. */
3799 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
3800 fprintf (STREAM, "\t.zero\t%u\n", (NBYTES)) */
3802 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
3803 section because it fails put zeros in the bytes that are skipped. This is
3804 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
3805 instructions rather than zeros when used in the text section. */
3806 /* #define ASM_NO_SKIP_IN_TEXT */
3808 /* A C statement to output to the stdio stream STREAM an assembler command to
3809 advance the location counter to a multiple of 2 to the POWER bytes. POWER
3810 will be a C expression of type `int'. */
3811 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
3812 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
3815 /* Macros Affecting all Debug Formats. */
3817 /* A C expression that returns the DBX register number for the compiler
3818 register number REGNO. In simple cases, the value of this expression may be
3819 REGNO itself. But sometimes there are some registers that the compiler
3820 knows about and DBX does not, or vice versa. In such cases, some register
3821 may need to have one number in the compiler and another for DBX.
3823 If two registers have consecutive numbers inside GNU CC, and they can be
3824 used as a pair to hold a multiword value, then they *must* have consecutive
3825 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
3826 will be unable to access such a pair, because they expect register pairs to
3827 be consecutive in their own numbering scheme.
3829 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
3830 preserve register pairs, then what you must do instead is redefine the
3831 actual register numbering scheme. */
3832 #define DBX_REGISTER_NUMBER(REGNO) \
3833 (GPR_P (REGNO) ? ((REGNO) - GPR_FIRST) \
3834 : ACCUM_P (REGNO) ? ((REGNO) - ACCUM_FIRST + 84) \
3835 : FLAG_P (REGNO) ? 66 /* return psw for all flags */ \
3836 : (REGNO) == ARG_POINTER_REGNUM ? (GPR_SP - GPR_FIRST) \
3837 : (REGNO) == CR_PSW ? (66 + 0) \
3838 : (REGNO) == CR_BPSW ? (66 + 1) \
3839 : (REGNO) == CR_PC ? (66 + 2) \
3840 : (REGNO) == CR_BPC ? (66 + 3) \
3841 : (REGNO) == CR_DPSW ? (66 + 4) \
3842 : (REGNO) == CR_DPC ? (66 + 5) \
3843 : (REGNO) == CR_RPT_C ? (66 + 7) \
3844 : (REGNO) == CR_RPT_S ? (66 + 8) \
3845 : (REGNO) == CR_RPT_E ? (66 + 9) \
3846 : (REGNO) == CR_MOD_S ? (66 + 10) \
3847 : (REGNO) == CR_MOD_E ? (66 + 11) \
3848 : (REGNO) == CR_IBA ? (66 + 14) \
3849 : (REGNO) == CR_EIT_VB ? (66 + 15) \
3850 : (REGNO) == CR_INT_S ? (66 + 16) \
3851 : (REGNO) == CR_INT_M ? (66 + 17) \
3854 /* A C expression that returns the integer offset value for an automatic
3855 variable having address X (an RTL expression). The default computation
3856 assumes that X is based on the frame-pointer and gives the offset from the
3857 frame-pointer. This is required for targets that produce debugging output
3858 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
3859 to be eliminated when the `-g' options is used. */
3860 /* #define DEBUGGER_AUTO_OFFSET(X) */
3862 /* A C expression that returns the integer offset value for an argument having
3863 address X (an RTL expression). The nominal offset is OFFSET. */
3864 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
3866 /* A C expression that returns the type of debugging output GNU CC produces
3867 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
3868 for GNU CC to support more than one format of debugging output. Currently,
3869 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
3870 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
3872 The value of this macro only affects the default debugging output; the user
3873 can always get a specific type of output by using `-gstabs', `-gcoff',
3874 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
3876 Defined in svr4.h. */
3878 #undef PREFERRED_DEBUGGING_TYPE
3879 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
3882 /* Specific Options for DBX Output. */
3884 /* Define this macro if GNU CC should produce debugging output for DBX in
3885 response to the `-g' option.
3887 Defined in svr4.h. */
3888 /* #define DBX_DEBUGGING_INFO */
3890 /* Define this macro if GNU CC should produce XCOFF format debugging output in
3891 response to the `-g' option. This is a variant of DBX format. */
3892 /* #define XCOFF_DEBUGGING_INFO */
3894 /* Define this macro to control whether GNU CC should by default generate GDB's
3895 extended version of DBX debugging information (assuming DBX-format debugging
3896 information is enabled at all). If you don't define the macro, the default
3897 is 1: always generate the extended information if there is any occasion to. */
3898 /* #define DEFAULT_GDB_EXTENSIONS */
3900 /* Define this macro if all `.stabs' commands should be output while in the
3902 /* #define DEBUG_SYMS_TEXT */
3904 /* A C string constant naming the assembler pseudo op to use instead of
3905 `.stabs' to define an ordinary debugging symbol. If you don't define this
3906 macro, `.stabs' is used. This macro applies only to DBX debugging
3907 information format. */
3908 /* #define ASM_STABS_OP */
3910 /* A C string constant naming the assembler pseudo op to use instead of
3911 `.stabd' to define a debugging symbol whose value is the current location.
3912 If you don't define this macro, `.stabd' is used. This macro applies only
3913 to DBX debugging information format. */
3914 /* #define ASM_STABD_OP */
3916 /* A C string constant naming the assembler pseudo op to use instead of
3917 `.stabn' to define a debugging symbol with no name. If you don't define
3918 this macro, `.stabn' is used. This macro applies only to DBX debugging
3919 information format. */
3920 /* #define ASM_STABN_OP */
3922 /* Define this macro if DBX on your system does not support the construct
3923 `xsTAGNAME'. On some systems, this construct is used to describe a forward
3924 reference to a structure named TAGNAME. On other systems, this construct is
3925 not supported at all. */
3926 /* #define DBX_NO_XREFS */
3928 /* A symbol name in DBX-format debugging information is normally continued
3929 (split into two separate `.stabs' directives) when it exceeds a certain
3930 length (by default, 80 characters). On some operating systems, DBX requires
3931 this splitting; on others, splitting must not be done. You can inhibit
3932 splitting by defining this macro with the value zero. You can override the
3933 default splitting-length by defining this macro as an expression for the
3934 length you desire. */
3935 /* #define DBX_CONTIN_LENGTH */
3937 /* Normally continuation is indicated by adding a `\' character to the end of a
3938 `.stabs' string when a continuation follows. To use a different character
3939 instead, define this macro as a character constant for the character you
3940 want to use. Do not define this macro if backslash is correct for your
3942 /* #define DBX_CONTIN_CHAR */
3944 /* Define this macro if it is necessary to go to the data section before
3945 outputting the `.stabs' pseudo-op for a non-global static variable. */
3946 /* #define DBX_STATIC_STAB_DATA_SECTION */
3948 /* The value to use in the "code" field of the `.stabs' directive for a
3949 typedef. The default is `N_LSYM'. */
3950 /* #define DBX_TYPE_DECL_STABS_CODE */
3952 /* The value to use in the "code" field of the `.stabs' directive for a static
3953 variable located in the text section. DBX format does not provide any
3954 "right" way to do this. The default is `N_FUN'. */
3955 /* #define DBX_STATIC_CONST_VAR_CODE */
3957 /* The value to use in the "code" field of the `.stabs' directive for a
3958 parameter passed in registers. DBX format does not provide any "right" way
3959 to do this. The default is `N_RSYM'. */
3960 /* #define DBX_REGPARM_STABS_CODE */
3962 /* The letter to use in DBX symbol data to identify a symbol as a parameter
3963 passed in registers. DBX format does not customarily provide any way to do
3964 this. The default is `'P''. */
3965 /* #define DBX_REGPARM_STABS_LETTER */
3967 /* The letter to use in DBX symbol data to identify a symbol as a stack
3968 parameter. The default is `'p''. */
3969 /* #define DBX_MEMPARM_STABS_LETTER */
3971 /* Define this macro if the DBX information for a function and its arguments
3972 should precede the assembler code for the function. Normally, in DBX
3973 format, the debugging information entirely follows the assembler code.
3975 Defined in svr4.h. */
3976 /* #define DBX_FUNCTION_FIRST */
3978 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
3979 debugging information for variables and functions defined in that block.
3980 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
3981 /* #define DBX_LBRAC_FIRST */
3983 /* Define this macro if the value of a symbol describing the scope of a block
3984 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
3985 function. Normally, GNU C uses an absolute address.
3987 Defined in svr4.h. */
3988 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
3990 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
3991 stabs for included header files, as on Sun systems. This macro
3992 also directs GNU C to output a type number as a pair of a file
3993 number and a type number within the file. Normally, GNU C does not
3994 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
3995 number for a type number. */
3996 /* #define DBX_USE_BINCL */
3999 /* Open ended Hooks for DBX Output. */
4001 /* Define this macro to say how to output to STREAM the debugging information
4002 for the start of a scope level for variable names. The argument NAME is the
4003 name of an assembler symbol (for use with `assemble_name') whose value is
4004 the address where the scope begins. */
4005 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
4007 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
4008 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
4010 /* Define this macro if the target machine requires special handling to output
4011 an enumeration type. The definition should be a C statement (sans
4012 semicolon) to output the appropriate information to STREAM for the type
4014 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
4016 /* Define this macro if the target machine requires special output at the end
4017 of the debugging information for a function. The definition should be a C
4018 statement (sans semicolon) to output the appropriate information to STREAM.
4019 FUNCTION is the `FUNCTION_DECL' node for the function. */
4020 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
4022 /* Define this macro if you need to control the order of output of the standard
4023 data types at the beginning of compilation. The argument SYMS is a `tree'
4024 which is a chain of all the predefined global symbols, including names of
4027 Normally, DBX output starts with definitions of the types for integers and
4028 characters, followed by all the other predefined types of the particular
4029 language in no particular order.
4031 On some machines, it is necessary to output different particular types
4032 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
4033 symbols in the necessary order. Any predefined types that you don't
4034 explicitly output will be output afterward in no particular order.
4036 Be careful not to define this macro so that it works only for C. There are
4037 no global variables to access most of the built-in types, because another
4038 language may have another set of types. The way to output a particular type
4039 is to look through SYMS to see if you can find it. Here is an example:
4043 for (decl = syms; decl; decl = TREE_CHAIN (decl))
4044 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
4046 dbxout_symbol (decl);
4050 This does nothing if the expected type does not exist.
4052 See the function `init_decl_processing' in `c-decl.c' to find the names to
4053 use for all the built-in C types. */
4054 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
4056 /* Some stabs encapsulation formats (in particular ECOFF), cannot
4057 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
4058 extension construct. On those machines, define this macro to turn
4059 this feature off without disturbing the rest of the gdb extensions. */
4060 /* #define NO_DBX_FUNCTION_END */
4063 /* File names in DBX format. */
4065 /* Define this if DBX wants to have the current directory recorded in each
4068 Note that the working directory is always recorded if GDB extensions are
4070 /* #define DBX_WORKING_DIRECTORY */
4072 /* A C statement to output DBX debugging information to the stdio stream STREAM
4073 which indicates that file NAME is the main source file--the file specified
4074 as the input file for compilation. This macro is called only once, at the
4075 beginning of compilation.
4077 This macro need not be defined if the standard form of output for DBX
4078 debugging information is appropriate.
4080 Defined in svr4.h. */
4081 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
4083 /* A C statement to output DBX debugging information to the stdio stream STREAM
4084 which indicates that the current directory during compilation is named NAME.
4086 This macro need not be defined if the standard form of output for DBX
4087 debugging information is appropriate. */
4088 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
4090 /* A C statement to output DBX debugging information at the end of compilation
4091 of the main source file NAME.
4093 If you don't define this macro, nothing special is output at the end of
4094 compilation, which is correct for most machines. */
4095 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
4097 /* A C statement to output DBX debugging information to the stdio stream STREAM
4098 which indicates that file NAME is the current source file. This output is
4099 generated each time input shifts to a different source file as a result of
4100 `#include', the end of an included file, or a `#line' command.
4102 This macro need not be defined if the standard form of output for DBX
4103 debugging information is appropriate. */
4104 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4107 /* Macros for SDB and Dwarf Output. */
4109 /* Define this macro if GNU CC should produce COFF-style debugging output for
4110 SDB in response to the `-g' option. */
4111 /* #define SDB_DEBUGGING_INFO */
4113 /* Define this macro if GNU CC should produce dwarf format debugging output in
4114 response to the `-g' option.
4116 Defined in svr4.h. */
4117 /* #define DWARF_DEBUGGING_INFO */
4119 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
4120 output in response to the `-g' option.
4122 To support optional call frame debugging information, you must also define
4123 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
4124 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
4125 and `dwarf2out_reg_save' as appropriate from output_function_prologue() if
4128 Defined in svr4.h. */
4129 /* #define DWARF2_DEBUGGING_INFO */
4131 /* Define these macros to override the assembler syntax for the special SDB
4132 assembler directives. See `sdbout.c' for a list of these macros and their
4133 arguments. If the standard syntax is used, you need not define them
4135 /* #define PUT_SDB_... */
4137 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
4138 assembler directives. In that case, define this macro to be the delimiter
4139 to use (usually `\n'). It is not necessary to define a new set of
4140 `PUT_SDB_OP' macros if this is the only change required. */
4141 /* #define SDB_DELIM */
4143 /* Define this macro to override the usual method of constructing a dummy name
4144 for anonymous structure and union types. See `sdbout.c' for more
4146 /* #define SDB_GENERATE_FAKE */
4148 /* Define this macro to allow references to unknown structure, union, or
4149 enumeration tags to be emitted. Standard COFF does not allow handling of
4150 unknown references, MIPS ECOFF has support for it. */
4151 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
4153 /* Define this macro to allow references to structure, union, or enumeration
4154 tags that have not yet been seen to be handled. Some assemblers choke if
4155 forward tags are used, while some require it. */
4156 /* #define SDB_ALLOW_FORWARD_REFERENCES */
4159 /* Cross Compilation and Floating Point. */
4161 /* While all modern machines use 2's complement representation for integers,
4162 there are a variety of representations for floating point numbers. This
4163 means that in a cross-compiler the representation of floating point numbers
4164 in the compiled program may be different from that used in the machine doing
4167 Because different representation systems may offer different amounts of
4168 range and precision, the cross compiler cannot safely use the host machine's
4169 floating point arithmetic. Therefore, floating point constants must be
4170 represented in the target machine's format. This means that the cross
4171 compiler cannot use `atof' to parse a floating point constant; it must have
4172 its own special routine to use instead. Also, constant folding must emulate
4173 the target machine's arithmetic (or must not be done at all).
4175 The macros in the following table should be defined only if you are cross
4176 compiling between different floating point formats.
4178 Otherwise, don't define them. Then default definitions will be set up which
4179 use `double' as the data type, `==' to test for equality, etc.
4181 You don't need to worry about how many times you use an operand of any of
4182 these macros. The compiler never uses operands which have side effects. */
4184 /* A macro for the C data type to be used to hold a floating point value in the
4185 target machine's format. Typically this would be a `struct' containing an
4187 /* #define REAL_VALUE_TYPE */
4189 /* A macro for a C expression which compares for equality the two values, X and
4190 Y, both of type `REAL_VALUE_TYPE'. */
4191 /* #define REAL_VALUES_EQUAL(X, Y) */
4193 /* A macro for a C expression which tests whether X is less than Y, both values
4194 being of type `REAL_VALUE_TYPE' and interpreted as floating point numbers in
4195 the target machine's representation. */
4196 /* #define REAL_VALUES_LESS(X, Y) */
4198 /* A macro for a C expression which performs the standard library function
4199 `ldexp', but using the target machine's floating point representation. Both
4200 X and the value of the expression have type `REAL_VALUE_TYPE'. The second
4201 argument, SCALE, is an integer. */
4202 /* #define REAL_VALUE_LDEXP(X, SCALE) */
4204 /* A macro whose definition is a C expression to convert the target-machine
4205 floating point value X to a signed integer. X has type `REAL_VALUE_TYPE'. */
4206 /* #define REAL_VALUE_FIX(X) */
4208 /* A macro whose definition is a C expression to convert the target-machine
4209 floating point value X to an unsigned integer. X has type
4210 `REAL_VALUE_TYPE'. */
4211 /* #define REAL_VALUE_UNSIGNED_FIX(X) */
4213 /* A macro whose definition is a C expression to round the target-machine
4214 floating point value X towards zero to an integer value (but still as a
4215 floating point number). X has type `REAL_VALUE_TYPE', and so does the
4217 /* #define REAL_VALUE_RNDZINT(X) */
4219 /* A macro whose definition is a C expression to round the target-machine
4220 floating point value X towards zero to an unsigned integer value (but still
4221 represented as a floating point number). X has type `REAL_VALUE_TYPE', and
4222 so does the value. */
4223 /* #define REAL_VALUE_UNSIGNED_RNDZINT(X) */
4225 /* A macro for a C expression which converts STRING, an expression of type
4226 `char *', into a floating point number in the target machine's
4227 representation for mode MODE. The value has type `REAL_VALUE_TYPE'. */
4228 /* #define REAL_VALUE_ATOF(STRING, MODE) */
4230 /* Define this macro if infinity is a possible floating point value, and
4231 therefore division by 0 is legitimate. */
4232 /* #define REAL_INFINITY */
4234 /* A macro for a C expression which determines whether X, a floating point
4235 value, is infinity. The value has type `int'. By default, this is defined
4237 /* #define REAL_VALUE_ISINF(X) */
4239 /* A macro for a C expression which determines whether X, a floating point
4240 value, is a "nan" (not-a-number). The value has type `int'. By default,
4241 this is defined to call `isnan'. */
4242 /* #define REAL_VALUE_ISNAN(X) */
4244 /* Define the following additional macros if you want to make floating point
4245 constant folding work while cross compiling. If you don't define them,
4246 cross compilation is still possible, but constant folding will not happen
4247 for floating point values. */
4249 /* A macro for a C statement which calculates an arithmetic operation of the
4250 two floating point values X and Y, both of type `REAL_VALUE_TYPE' in the
4251 target machine's representation, to produce a result of the same type and
4252 representation which is stored in OUTPUT (which will be a variable).
4254 The operation to be performed is specified by CODE, a tree code which will
4255 always be one of the following: `PLUS_EXPR', `MINUS_EXPR', `MULT_EXPR',
4256 `RDIV_EXPR', `MAX_EXPR', `MIN_EXPR'.
4258 The expansion of this macro is responsible for checking for overflow. If
4259 overflow happens, the macro expansion should execute the statement `return
4260 0;', which indicates the inability to perform the arithmetic operation
4262 /* #define REAL_ARITHMETIC(OUTPUT, CODE, X, Y) */
4264 /* The real.h file actually defines REAL_ARITHMETIC appropriately if it was
4265 defined at all before entering into the code, by using #undef first. */
4266 #define REAL_ARITHMETIC
4268 /* A macro for a C expression which returns the negative of the floating point
4269 value X. Both X and the value of the expression have type `REAL_VALUE_TYPE'
4270 and are in the target machine's floating point representation.
4272 There is no way for this macro to report overflow, since overflow can't
4273 happen in the negation operation. */
4274 /* #define REAL_VALUE_NEGATE(X) */
4276 /* A macro for a C expression which converts the floating point value X to mode
4279 Both X and the value of the expression are in the target machine's floating
4280 point representation and have type `REAL_VALUE_TYPE'. However, the value
4281 should have an appropriate bit pattern to be output properly as a floating
4282 constant whose precision accords with mode MODE.
4284 There is no way for this macro to report overflow. */
4285 /* #define REAL_VALUE_TRUNCATE(MODE, X) */
4287 /* A macro for a C expression which converts a floating point value X into a
4288 double-precision integer which is then stored into LOW and HIGH, two
4289 variables of type INT. */
4290 /* #define REAL_VALUE_TO_INT(LOW, HIGH, X) */
4292 /* A macro for a C expression which converts a double-precision integer found
4293 in LOW and HIGH, two variables of type INT, into a floating point value
4294 which is then stored into X. */
4295 /* #define REAL_VALUE_FROM_INT(X, LOW, HIGH) */
4298 /* Miscellaneous Parameters. */
4300 /* Define this if you have defined special-purpose predicates in the file
4301 `MACHINE.c'. This macro is called within an initializer of an array of
4302 structures. The first field in the structure is the name of a predicate and
4303 the second field is an array of rtl codes. For each predicate, list all rtl
4304 codes that can be in expressions matched by the predicate. The list should
4305 have a trailing comma. Here is an example of two entries in the list for a
4306 typical RISC machine:
4308 #define PREDICATE_CODES \
4309 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
4310 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
4312 Defining this macro does not affect the generated code (however, incorrect
4313 definitions that omit an rtl code that may be matched by the predicate can
4314 cause the compiler to malfunction). Instead, it allows the table built by
4315 `genrecog' to be more compact and efficient, thus speeding up the compiler.
4316 The most important predicates to include in the list specified by this macro
4317 are thoses used in the most insn patterns. */
4319 #define PREDICATE_CODES \
4320 { "short_memory_operand", { MEM }}, \
4321 { "long_memory_operand", { MEM }}, \
4322 { "d30v_memory_operand", { MEM }}, \
4323 { "single_reg_memory_operand", { MEM }}, \
4324 { "const_addr_memory_operand", { MEM }}, \
4325 { "call_operand", { MEM }}, \
4326 { "gpr_operand", { REG, SUBREG }}, \
4327 { "accum_operand", { REG, SUBREG }}, \
4328 { "gpr_or_accum_operand", { REG, SUBREG }}, \
4329 { "cr_operand", { REG, SUBREG }}, \
4330 { "repeat_operand", { REG, SUBREG }}, \
4331 { "flag_operand", { REG, SUBREG }}, \
4332 { "br_flag_operand", { REG, SUBREG }}, \
4333 { "br_flag_or_constant_operand", { REG, SUBREG, CONST_INT }}, \
4334 { "gpr_or_br_flag_operand", { REG, SUBREG }}, \
4335 { "f0_operand", { REG, SUBREG }}, \
4336 { "f1_operand", { REG, SUBREG }}, \
4337 { "carry_operand", { REG, SUBREG }}, \
4338 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, \
4340 { "gpr_or_signed6_operand", { REG, SUBREG, CONST_INT }}, \
4341 { "gpr_or_unsigned5_operand", { REG, SUBREG, CONST_INT }}, \
4342 { "gpr_or_unsigned6_operand", { REG, SUBREG, CONST_INT }}, \
4343 { "gpr_or_constant_operand", { REG, SUBREG, CONST_INT, \
4344 CONST, SYMBOL_REF, \
4346 { "gpr_or_dbl_const_operand", { REG, SUBREG, CONST_INT, \
4347 CONST, SYMBOL_REF, \
4348 LABEL_REF, CONST_DOUBLE }}, \
4349 { "gpr_or_memory_operand", { REG, SUBREG, MEM }}, \
4350 { "move_input_operand", { REG, SUBREG, MEM, CONST_INT, \
4351 CONST, SYMBOL_REF, \
4352 LABEL_REF, CONST_DOUBLE }}, \
4353 { "move_output_operand", { REG, SUBREG, MEM }}, \
4354 { "signed6_operand", { CONST_INT }}, \
4355 { "unsigned5_operand", { CONST_INT }}, \
4356 { "unsigned6_operand", { CONST_INT }}, \
4357 { "bitset_operand", { CONST_INT }}, \
4358 { "condexec_test_operator", { EQ, NE }}, \
4359 { "condexec_branch_operator", { EQ, NE }}, \
4360 { "condexec_unary_operator", { ABS, NEG, NOT, ZERO_EXTEND }}, \
4361 { "condexec_addsub_operator", { PLUS, MINUS }}, \
4362 { "condexec_binary_operator", { MULT, AND, IOR, XOR, \
4363 ASHIFT, ASHIFTRT, LSHIFTRT, \
4364 ROTATE, ROTATERT }}, \
4365 { "condexec_shiftl_operator", { ASHIFT, ROTATE }}, \
4366 { "condexec_extend_operator", { SIGN_EXTEND, ZERO_EXTEND }}, \
4367 { "branch_zero_operator", { EQ, NE }}, \
4368 { "cond_move_dest_operand", { REG, SUBREG, MEM }}, \
4369 { "cond_move_operand", { REG, SUBREG, CONST_INT, \
4370 CONST, SYMBOL_REF, \
4371 LABEL_REF, MEM }}, \
4372 { "cond_exec_operand", { REG, SUBREG, CONST_INT, \
4373 CONST, SYMBOL_REF, \
4374 LABEL_REF, MEM }}, \
4375 { "srelational_si_operator", { EQ, NE, LT, LE, GT, GE }}, \
4376 { "urelational_si_operator", { LTU, LEU, GTU, GEU }}, \
4377 { "relational_di_operator", { EQ, NE, LT, LE, GT, GE, \
4378 LTU, LEU, GTU, GEU }},
4380 /* An alias for a machine mode name. This is the machine mode that elements of
4381 a jump-table should have. */
4382 #define CASE_VECTOR_MODE SImode
4384 /* Define as C expression which evaluates to nonzero if the tablejump
4385 instruction expects the table to contain offsets from the address of the
4387 Do not define this if the table should contain absolute addresses. */
4388 /* #define CASE_VECTOR_PC_RELATIVE 1 */
4390 /* Define this if control falls through a `case' insn when the index value is
4391 out of range. This means the specified default-label is actually ignored by
4392 the `case' insn proper. */
4393 /* #define CASE_DROPS_THROUGH */
4395 /* Define this to be the smallest number of different values for which it is
4396 best to use a jump-table instead of a tree of conditional branches. The
4397 default is four for machines with a `casesi' instruction and five otherwise.
4398 This is best for most machines. */
4399 /* #define CASE_VALUES_THRESHOLD */
4401 /* Define this macro if operations between registers with integral mode smaller
4402 than a word are always performed on the entire register. Most RISC machines
4403 have this property and most CISC machines do not. */
4404 #define WORD_REGISTER_OPERATIONS 1
4406 /* Define this macro to be a C expression indicating when insns that read
4407 memory in MODE, an integral mode narrower than a word, set the bits outside
4408 of MODE to be either the sign-extension or the zero-extension of the data
4409 read. Return `SIGN_EXTEND' for values of MODE for which the insn
4410 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
4413 This macro is not called with MODE non-integral or with a width greater than
4414 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
4415 not define this macro if it would always return `NIL'. On machines where
4416 this macro is defined, you will normally define it as the constant
4417 `SIGN_EXTEND' or `ZERO_EXTEND'. */
4419 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
4421 /* Define if loading short immediate values into registers sign extends. */
4422 #define SHORT_IMMEDIATES_SIGN_EXTEND
4424 /* Define this macro if the same instructions that convert a floating point
4425 number to a signed fixed point number also convert validly to an unsigned
4427 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
4429 /* The maximum number of bytes that a single instruction can move quickly from
4430 memory to memory. */
4433 /* The maximum number of bytes that a single instruction can move quickly from
4434 memory to memory. If this is undefined, the default is `MOVE_MAX'.
4435 Otherwise, it is the constant value that is the largest value that
4436 `MOVE_MAX' can have at run-time. */
4437 /* #define MAX_MOVE_MAX */
4439 /* A C expression that is nonzero if on this machine the number of bits
4440 actually used for the count of a shift operation is equal to the number of
4441 bits needed to represent the size of the object being shifted. When this
4442 macro is non-zero, the compiler will assume that it is safe to omit a
4443 sign-extend, zero-extend, and certain bitwise `and' instructions that
4444 truncates the count of a shift operation. On machines that have
4445 instructions that act on bitfields at variable positions, which may include
4446 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
4447 deletion of truncations of the values that serve as arguments to bitfield
4450 If both types of instructions truncate the count (for shifts) and position
4451 (for bitfield operations), or if no variable-position bitfield instructions
4452 exist, you should define this macro.
4454 However, on some machines, such as the 80386 and the 680x0, truncation only
4455 applies to shift operations and not the (real or pretended) bitfield
4456 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
4457 Instead, add patterns to the `md' file that include the implied truncation
4458 of the shift instructions.
4460 You need not define this macro if it would always have the value of zero. */
4461 /* #define SHIFT_COUNT_TRUNCATED */
4463 /* A C expression which is nonzero if on this machine it is safe to "convert"
4464 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
4465 than INPREC) by merely operating on it as if it had only OUTPREC bits.
4467 On many machines, this expression can be 1.
4469 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
4470 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
4471 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
4473 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
4475 /* A C expression describing the value returned by a comparison operator with
4476 an integral mode and stored by a store-flag instruction (`sCOND') when the
4477 condition is true. This description must apply to *all* the `sCOND'
4478 patterns and all the comparison operators whose results have a `MODE_INT'
4481 A value of 1 or -1 means that the instruction implementing the comparison
4482 operator returns exactly 1 or -1 when the comparison is true and 0 when the
4483 comparison is false. Otherwise, the value indicates which bits of the
4484 result are guaranteed to be 1 when the comparison is true. This value is
4485 interpreted in the mode of the comparison operation, which is given by the
4486 mode of the first operand in the `sCOND' pattern. Either the low bit or the
4487 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
4490 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
4491 that depends only on the specified bits. It can also replace comparison
4492 operators with equivalent operations if they cause the required bits to be
4493 set, even if the remaining bits are undefined. For example, on a machine
4494 whose comparison operators return an `SImode' value and where
4495 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
4496 is relevant, the expression
4498 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
4502 (ashift:SI X (const_int N))
4504 where N is the appropriate shift count to move the bit being tested into the
4507 There is no way to describe a machine that always sets the low-order bit for
4508 a true value, but does not guarantee the value of any other bits, but we do
4509 not know of any machine that has such an instruction. If you are trying to
4510 port GNU CC to such a machine, include an instruction to perform a
4511 logical-and of the result with 1 in the pattern for the comparison operators
4512 and let us know (*note How to Report Bugs: Bug Reporting.).
4514 Often, a machine will have multiple instructions that obtain a value from a
4515 comparison (or the condition codes). Here are rules to guide the choice of
4516 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
4518 * Use the shortest sequence that yields a valid definition for
4519 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
4520 "normalize" the value (convert it to, e.g., 1 or 0) than for
4521 the comparison operators to do so because there may be
4522 opportunities to combine the normalization with other
4525 * For equal-length sequences, use a value of 1 or -1, with -1
4526 being slightly preferred on machines with expensive jumps and
4527 1 preferred on other machines.
4529 * As a second choice, choose a value of `0x80000001' if
4530 instructions exist that set both the sign and low-order bits
4531 but do not define the others.
4533 * Otherwise, use a value of `0x80000000'.
4535 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
4536 its negation in the same number of instructions. On those machines, you
4537 should also define a pattern for those cases, e.g., one matching
4539 (set A (neg:M (ne:M B C)))
4541 Some machines can also perform `and' or `plus' operations on condition code
4542 values with less instructions than the corresponding `sCOND' insn followed
4543 by `and' or `plus'. On those machines, define the appropriate patterns.
4544 Use the names `incscc' and `decscc', respectively, for the the patterns
4545 which perform `plus' or `minus' operations on condition code values. See
4546 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
4547 such instruction sequences on other machines.
4549 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
4551 /* #define STORE_FLAG_VALUE */
4553 /* A C expression that gives a non-zero floating point value that is returned
4554 when comparison operators with floating-point results are true. Define this
4555 macro on machine that have comparison operations that return floating-point
4556 values. If there are no such operations, do not define this macro. */
4557 /* #define FLOAT_STORE_FLAG_VALUE */
4559 /* An alias for the machine mode for pointers. On most machines, define this
4560 to be the integer mode corresponding to the width of a hardware pointer;
4561 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
4562 you must define this to be one of the partial integer modes, such as
4565 The width of `Pmode' must be at least as large as the value of
4566 `POINTER_SIZE'. If it is not equal, you must define the macro
4567 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
4568 #define Pmode SImode
4570 /* An alias for the machine mode used for memory references to functions being
4571 called, in `call' RTL expressions. On most machines this should be
4573 #define FUNCTION_MODE QImode
4575 /* A C expression for the maximum number of instructions above which the
4576 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
4578 The default definition of this macro is 64 plus 8 times the number of
4579 arguments that the function accepts. Some people think a larger threshold
4580 should be used on RISC machines. */
4581 /* #define INTEGRATE_THRESHOLD(DECL) */
4583 /* Define this if the preprocessor should ignore `#sccs' directives and print
4586 Defined in svr4.h. */
4587 /* #define SCCS_DIRECTIVE */
4589 /* Define this macro if the system header files support C++ as well as C. This
4590 macro inhibits the usual method of using system header files in C++, which
4591 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
4592 /* #define NO_IMPLICIT_EXTERN_C */
4594 /* Define this macro to handle System V style pragmas (particularly #pack).
4596 Defined in svr4.h. */
4597 #define HANDLE_SYSV_PRAGMA
4599 /* Define this macro if you want to handle #pragma weak (HANDLE_SYSV_PRAGMA
4600 must also be defined). */
4601 /* #define HANDLE_WEAK_PRAGMA */
4603 /* Define this macro if the assembler does not accept the character `$' in
4604 label names. By default constructors and destructors in G++ have `$' in the
4605 identifiers. If this macro is defined, `.' is used instead.
4607 Defined in svr4.h. */
4608 /* #define NO_DOLLAR_IN_LABEL */
4610 /* Define this macro if the assembler does not accept the character `.' in
4611 label names. By default constructors and destructors in G++ have names that
4612 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
4613 /* #define NO_DOT_IN_LABEL */
4615 /* Define this macro if the target system expects every program's `main'
4616 function to return a standard "success" value by default (if no other value
4617 is explicitly returned).
4619 The definition should be a C statement (sans semicolon) to generate the
4620 appropriate rtl instructions. It is used only when compiling the end of
4622 /* #define DEFAULT_MAIN_RETURN */
4624 /* Define this if your `exit' function needs to do something besides calling an
4625 external function `_cleanup' before terminating with `_exit'. The
4626 `EXIT_BODY' macro is only needed if `NEED_ATEXIT' is defined and
4627 `ON_EXIT' is not defined. */
4628 /* #define EXIT_BODY */
4630 /* Define this macro as a C expression that is nonzero if it is safe for the
4631 delay slot scheduler to place instructions in the delay slot of INSN, even
4632 if they appear to use a resource set or clobbered in INSN. INSN is always a
4633 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
4634 behavior. On machines where some `insn' or `jump_insn' is really a function
4635 call and hence has this behavior, you should define this macro.
4637 You need not define this macro if it would always return zero. */
4638 /* #define INSN_SETS_ARE_DELAYED(INSN) */
4640 /* Define this macro as a C expression that is nonzero if it is safe for the
4641 delay slot scheduler to place instructions in the delay slot of INSN, even
4642 if they appear to set or clobber a resource referenced in INSN. INSN is
4643 always a `jump_insn' or an `insn'. On machines where some `insn' or
4644 `jump_insn' is really a function call and its operands are registers whose
4645 use is actually in the subroutine it calls, you should define this macro.
4646 Doing so allows the delay slot scheduler to move instructions which copy
4647 arguments into the argument registers into the delay slot of INSN.
4649 You need not define this macro if it would always return zero. */
4650 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
4652 /* In rare cases, correct code generation requires extra machine dependent
4653 processing between the second jump optimization pass and delayed branch
4654 scheduling. On those machines, define this macro as a C statement to act on
4655 the code starting at INSN. */
4656 #define MACHINE_DEPENDENT_REORG(INSN) d30v_machine_dependent_reorg (INSN)
4658 /* Define this macro if in some cases global symbols from one translation unit
4659 may not be bound to undefined symbols in another translation unit without
4660 user intervention. For instance, under Microsoft Windows symbols must be
4661 explicitly imported from shared libraries (DLLs). */
4662 /* #define MULTIPLE_SYMBOL_SPACES */
4664 /* A C expression for the maximum number of instructions to execute via
4665 conditional execution instructions instead of a branch. A value of
4666 BRANCH_COST+1 is the default if the machine does not use cc0, and 1 if it
4668 #define MAX_CONDITIONAL_EXECUTE d30v_cond_exec
4670 #define D30V_DEFAULT_MAX_CONDITIONAL_EXECUTE 4
4672 /* Values of the -mcond-exec=n string. */
4673 extern int d30v_cond_exec;
4674 extern const char *d30v_cond_exec_string;
4676 #endif /* GCC_D30V_H */
OSDN Git Service
